Preheat your oven to 350°F (175°C).

In a large skillet over medium heat, cook the ground turkey until fully browned. Drain any excess fat.

Add the softened cream cheese to the skillet and stir until completely melted and combined with the turkey.

Stir in the fresh spinach and cook until wilted.

If using, add the diced red bell peppers and mix well.

In a separate bowl, whisk together the egg, garlic powder, salt, and black pepper.

Add the egg mixture to the turkey mixture and stir to combine.

Fold in the shredded cheddar cheese and Greek yogurt (if using).

Transfer the mixture to a greased casserole dish and spread evenly.

Bake for 25–30 minutes, until the top is golden and the casserole is fully set.

Remove from the oven, let cool slightly, then slice and serve.