Directions1.
Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch casserole dish with a bit of olive oil and set it aside.
Heat 1 tablespoon (15 ml / 0.5 fl oz) of olive oil in a large skillet over medium heat.
Add the ground sausage and cook, breaking it apart with a spoon, until browned and cooked through, about 5-7 minutes.
Drain any excess grease.
While the sausage cooks, whisk together the eggs, cooked spaghetti squash, and fresh oregano in a large bowl.
Season with a pinch of sea salt and black pepper.
Add the cooked sausage to the egg mixture and stir gently until everything is just combined.
Pour the mixture into your prepared casserole dish.
Sprinkle the shredded Cheddar cheese evenly over the top.
Cover the dish loosely with aluminum foil and bake for 30 minutes.
Carefully remove the foil and continue to bake for another 15 minutes, or until the center is set and the cheese is golden and bubbly.
Let the casserole rest on a cooling rack for at least 10 minutes before slicing and serving. This helps it set up properly.