Preheat your oven to 360°F (182°C) and line a large baking sheet with a piece of parchment paper to prevent sticking.
Arrange the 4 mackerel fillets (21. 2 oz (600g)) on the prepared baking sheet, ensuring they are spaced out evenly for even heat distribution.
Drizzle 2. 0 tbsp (30ml) of olive oil and 2. 0 tbsp (30ml) of fresh lime juice directly over the fish, then sprinkle with 0. 5 tsp (1. 2g / 0.07 oz) of sweet paprika.
Rub the oil and seasonings gently into the flesh of each fillet using your hands or a pastry brush to ensure full coverage.
Bake at 360°F (182°C) for 30 minutes, or until the fish is opaque and flakes easily with a fork.
Don't Skip the Room Temp Rest: Take your mackerel fillets out of the fridge about 10–15 minutes before baking. This ensures the Lime Mackerel cooks evenly from edge to center.
Pat it Dry: Before adding your oil and lime, pat the skin side of the mackerel with a paper towel. This helps the seasoning stick better and prevents the fish from steaming rather than roasting.
Zest for Extra Zing: For a more intense citrus aroma, grate 0. 1 oz (3g) of lime zest over the fillets before they go into the oven. The oils in the zest provide a deeper flavor than the juice alone.