Preheat your oven to 375°F (190°C).
In a large skillet, heat the olive oil over medium heat. Add the sliced chicken and cook until browned and cooked through, about 5-7 minutes. Season with garlic powder, onion powder, salt, pepper, and paprika.
Remove the chicken from the skillet and set aside.
In the same skillet, add the sliced red and yellow bell peppers. Sauté for about 3-4 minutes until they start to soften.
In a rectangular glass baking dish, layer the cooked chicken and sautéed peppers.
Sprinkle the shredded cheddar and mozzarella cheeses evenly over the top.
Place the baking dish in the preheated oven and bake for 15-20 minutes, or until the cheese is melted and bubbly.

Remove from the oven and let it cool for a few minutes before serving.
Variations & Tips
For a spicier kick, add more red pepper flakes or some sliced jalapeños. You can also experiment with different cheeses like pepper jack or gouda for a unique flavor. If you’re not strictly low carb, consider adding a layer of cooked quinoa or brown rice at the bottom for extra heartiness. For a vegetarian version, substitute the chicken with sliced mushrooms or zucchini.