1. Preheat your oven to 400°F. I find this temperature perfect for roasting veggies and cooking chicken evenly without drying it out.
2. Pat the chicken breasts dry with paper towels. Season both sides generously with salt, pepper, oregano, and smoked paprika. These spices bring a subtle smoky warmth that reminds me of cozy family dinners.
3. In a large oven-safe skillet or baking dish, heat olive oil over medium heat. Add the chicken breasts and sear for 3 minutes on each side until they develop a light golden crust. This locks in the juices and adds flavor.
4. Remove the chicken briefly and set aside. Add the sliced peppers, onions, and minced garlic to the same skillet. Toss them in the remaining oil and cook for about 5 minutes until they start to soften. The kitchen smells amazing at this point—one of those moments that make me grateful for the simple joys of cooking.
5. Nestle the chicken breasts back among the pepper and onion mixture. Sprinkle the shredded mozzarella and cheddar evenly over the top.
6. Transfer the skillet or dish to the preheated oven. Bake uncovered for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the cheese is bubbly and golden.
7. Remove from the oven and let it rest for 5 minutes. Garnish with fresh basil or parsley before serving. This little touch of green adds a fresh, vibrant note that brightens the whole dish.

Pro tip from my kitchen: Letting the chicken rest after baking helps keep it juicy, especially when you’re working with lean breasts. And if your family loves a bit of extra crisp, you can broil the dish for 1-2 minutes at the end to get the cheese bubbling and golden-brown.