Quick & Easy Instant Pot Fish Stew

Lunch, Seafood

March 29, 2026

Craving a comforting, restaurant-quality meal that’s ready in a flash? This Instant Pot Classic Fish Stew is your answer! In just 30 minutes, you can have a rich, aromatic stew brimming with tender pollock, succulent prawns, and a savory herb-infused broth. It’s the perfect one-pot wonder for busy weeknights when you need something both nourishing and incredibly delicious.

Ingredients

• 2 lbs / 900g pollock fillets, skinless and cut into 2-inch chunks
• 1 lb / 450g king prawns, raw, shelled, and deveined
• ½ cup / 120ml extra virgin olive oil, divided
• 2 small onions, finely chopped
• 2 celery stalks, finely chopped
• 1 cup / 240ml fresh parsley, finely chopped
• 3 garlic cloves, crushed
• 3 cups / 720ml fish stock
• 1 tsp / 5ml sea salt
• 1 tbsp / 15ml fresh rosemary, finely chopped
• Freshly squeezed lemon juice, for serving

Instructions

1. Select the ‘Sauté’ function on your Instant Pot. Add three tablespoons of the olive oil to the inner pot and allow it to heat up.
2. Add the finely chopped onions and crushed garlic. Sauté for 4-5 minutes, stirring frequently until the onions are soft and fragrant.
3. Press ‘Cancel’ to stop the sautéing. Pour in the fish stock, then add the chopped celery, parsley, salt, and rosemary. Stir to combine.
4. Gently place the pollock fillets and raw prawns into the pot, along with the remaining olive oil. Give it a final gentle stir.
5. Secure the lid, ensuring the steam release valve is set to the ‘Sealing’ position. Select ‘Manual’ or ‘Pressure Cook’ and set the timer for 10 minutes at high pressure.
6. Once the cooking cycle is complete, carefully perform a quick pressure release by moving the steam release valve to the ‘Venting’ position. Wait for the float valve to drop completely.
7. Open the lid, stir the stew gently, and serve immediately. Garnish with a generous squeeze of fresh lemon juice.

Nutritional Information

• Per Serving
• Calories: 557
• Total Fat: 32g
• Net Carbs: 3.6g
• Protein: 60.8g
• Fiber: 1g

Pro Tips

• Feel free to use other firm white fish like cod, haddock, or halibut as a substitute for pollock.
• For a richer broth, deglaze the pot with a splash of dry white wine after sautéing the onions and garlic, before adding the stock.
• Add a pinch of red pepper flakes with the garlic for a gentle kick of heat.
• For extra veggies, stir in a cup of cherry tomatoes or a handful of spinach right after opening the lid.

FAQ

Q: Can I use a different fish for this Instant Pot fish stew
A: Yes, absolutely! While the recipe uses pollock, other firm white fish like cod, haddock, or halibut are excellent substitutes. The key is to use a fish that holds its shape well during pressure cooking.

Q: Is this fish stew recipe keto-friendly
A: With only 3.6g of net carbs per serving, this Instant Pot fish stew is a fantastic low-carb and keto-friendly option. It’s packed with protein and healthy fats, making it a nourishing and satisfying meal.

Q: What can I add to this seafood stew for more flavor
A: For a richer broth, deglaze the pot with a splash of dry white wine after sautéing the onions. You can also add a pinch of red pepper flakes for a bit of heat or stir in some cherry tomatoes after cooking for a touch of sweetness.

Q: Can I use frozen fish and prawns for this recipe
A: Yes, you can use frozen fish and prawns. For best results, thaw them completely before starting the recipe. If you cook from frozen, you may need to add a minute or two to the pressure cooking time, but be careful not to overcook the seafood.

More Keto Recipes

A smiling woman in a cozy kitchen setting holding up a deep blue bowl of freshly prepared Saucy Passata Brussels Sprouts, garnished with fresh chives.

Saucy Passata Brussels Sprouts

Ingredients For maximum accuracy in your kitchen, here are the precise measurements for the perfect batch: Brussels sprouts: 16 oz (450g) or 1.0 pound, trimmed and halved Tomato passata: 1.0 cup (8 oz / 225g) Chicken stock: 0.25 cup (2 fl oz / 60g) Olive oil: 1.0 tbsp...

A smiling woman standing in a bright, modern kitchen holding a rustic plate of freshly pan-fried Crab Cakes with Almond Flour, garnished with fresh parsley and a lemon wedge.

Crab Cakes with Almond Flour 

Preparation Time: 1 hour 10 minutes Cooking Time: 15 minutes Servings: 4 Ingredients Fresh crab meat: 8 oz (225g), shells removed Garlic: 1 tbsp (15g), minced Fresh parsley: 0.25 cups (15g), chopped Egg: 1 large egg (50g), slightly beaten Avocado oil mayonnaise: 1...

A smiling woman holding a delicious baking dish of Keto Fried Salmon paired with golden, cheesy baked broccoli and fresh lime wedges in a bright kitchen.

Keto Fried Salmon with Broccoli and Cheese

Ingredients Salmon: 12 oz (340g) salmon fillet; cut into bite-sized pieces. Butter: 3.0 tbsp (42g) butter, divided. Broccoli: 8 oz (225g) fresh broccoli; cut into small florets. Cheese: 2.0 oz (56g) cheddar cheese, grated (about 0.5 cups). Seasoning: 0.1 tsp (0.5g)...

A smiling woman holding a rustic ceramic plate featuring beautifully golden Roasted Salmon with Parmesan Dill Crust, served alongside fresh asparagus and a creamy dill sauce.

Roasted Salmon with Parmesan Dill Crust

Preparation Time: 10 minutes Cooking Time: 10 minutes Servings: 2 Ingredients 0.5 lbs (8.0 oz / 225g) salmon, cut into two equal pieces 1.0 tbsp (0.1 oz / 3g) fresh dill weed, chopped 0.25 cups (2.0 oz / 56g) cottage cheese 1.0 tbsp (0.5 oz / 14g) extra virgin olive...

A smiling woman in a grey sweater and beige apron holding a plate of delicious Keto Baked Salmon with Pesto, green sauce, and asparagus in a bright kitchen setting.

Keto Baked Salmon with Pesto

Ingredients For the Salmon: 0.5 lbs (8 oz / 225g) fresh salmon fillets 1 oz (28g / 2 tbsp) green pesto 0.05 oz (1.5g / 0.25 tsp) salt 0.05 oz (1.5g / 0.25 tsp) black pepper For the Creamy Green Sauce: 0.25 cups (60g / 2.1 oz) plain Greek yogurt 1 oz (28g / 2 tbsp)...

Person in a gray sweater holding a bowl of salad with smoked salmon, olives, arugula, and a lemon wedge in a kitchen.

Smoked Salmon Salad

Ingredients To make this vibrant dish, you will need the following exactly measured ingredients: 2 cups (1.5 oz / 42g) fresh arugula salad leaves 2 oz (56g) smoked salmon 4 large olives (0.5 oz / 14g) 1 tsp (0.1 oz / 2.8g) pink peppercorns, lightly crushed 1 slice...

A smiling woman wearing an apron holds a rustic bowl of freshly prepared Fish and Leek Sauté, showcasing the vibrant green leeks and cooked diced trout.

Fish and Leek Sauté

Ingredients Leek: 1.0 medium leek, chopped (approx. 5.3 oz / 150g) Trout: 2.0 fillets, diced (8.0 oz / 225g) Tamari: 1.0 tbsp (0.5 oz / 15g) tamari soy sauce Ginger: 1.0 tsp (0.1 oz / 3g) fresh ginger, grated Oil: 1.0 tbsp (0.5 oz / 14g) avocado oil Seasoning: 0.1 tsp...

A smiling woman standing in a bright kitchen, holding a rustic ceramic bowl filled with freshly cooked Garlic Lime Mahi-Mahi, garnished with chopped cilantro and lime wedges.

Garlic Lime Mahi-Mahi

Preparation Time: 15 minutes Cooking Time: 10 minutes Marinating Time: 30 minutes Servings: 4 Ingredients 4 Mahi-Mahi filets, approximately 16 to 20 oz (450g to 560g) total Zest and juice of 1 large fresh lime, approximately 2 tbsp (1 fl oz / 30ml) of juice 0.25 cup...

A smiling woman in a bright kitchen holding an oven-safe dish of freshly broiled Keto Spicy Oysters resting on a bed of fresh green basil leaves.

Ketogenic Spicy Oyster

Preparation Time: 10 minutes Cooking Time: 5 minutes Servings: 2 Ingredients 12 whole oysters, freshly shucked (yields approx. 8 oz / 225g of oyster meat) 1 tbsp. (0.5 oz / 15g) olive oil 7-8 fresh basil leaves (approx. 0.1 oz / 3g) 1 tbsp. (0.6 oz / 17g) garlic chili...

A smiling woman in a cozy kitchen setting holding up a deep blue bowl of freshly prepared Saucy Passata Brussels Sprouts, garnished with fresh chives.

Saucy Passata Brussels Sprouts

Ingredients For maximum accuracy in your kitchen, here are the precise measurements for the perfect batch: Brussels sprouts: 16 oz (450g) or 1.0 pound, trimmed and halved Tomato passata: 1.0 cup (8 oz / 225g) Chicken stock: 0.25 cup (2 fl oz / 60g) Olive oil: 1.0 tbsp...

A smiling woman standing in a bright, modern kitchen holding a rustic plate of freshly pan-fried Crab Cakes with Almond Flour, garnished with fresh parsley and a lemon wedge.

Crab Cakes with Almond Flour 

Preparation Time: 1 hour 10 minutes Cooking Time: 15 minutes Servings: 4 Ingredients Fresh crab meat: 8 oz (225g), shells removed Garlic: 1 tbsp (15g), minced Fresh parsley: 0.25 cups (15g), chopped Egg: 1 large egg (50g), slightly beaten Avocado oil mayonnaise: 1...

A smiling woman holding a delicious baking dish of Keto Fried Salmon paired with golden, cheesy baked broccoli and fresh lime wedges in a bright kitchen.

Keto Fried Salmon with Broccoli and Cheese

Ingredients Salmon: 12 oz (340g) salmon fillet; cut into bite-sized pieces. Butter: 3.0 tbsp (42g) butter, divided. Broccoli: 8 oz (225g) fresh broccoli; cut into small florets. Cheese: 2.0 oz (56g) cheddar cheese, grated (about 0.5 cups). Seasoning: 0.1 tsp (0.5g)...

A smiling woman holding a rustic ceramic plate featuring beautifully golden Roasted Salmon with Parmesan Dill Crust, served alongside fresh asparagus and a creamy dill sauce.

Roasted Salmon with Parmesan Dill Crust

Preparation Time: 10 minutes Cooking Time: 10 minutes Servings: 2 Ingredients 0.5 lbs (8.0 oz / 225g) salmon, cut into two equal pieces 1.0 tbsp (0.1 oz / 3g) fresh dill weed, chopped 0.25 cups (2.0 oz / 56g) cottage cheese 1.0 tbsp (0.5 oz / 14g) extra virgin olive...

0
Would love your thoughts, please comment.x
()
x
0