Preheat and Prep: Preheat your oven to 375°F (190°C). On a large baking dish, drizzle olive oil.
Sauté the Chicken: In a skillet over medium heat, add the diced chicken and garlic. Cook for about 5-7 minutes or until the chicken is no longer pink. Season with salt, pepper, and dried oregano.
Combine Ingredients: In the baking dish, layer the sliced zucchinis at the bottom. Then add the sautéed chicken on top, followed by the cherry tomatoes and sun-dried tomatoes.
Cheese It Up: Sprinkle the shredded mozzarella cheese generously over the top.
Bake: Place the baking dish into the preheated oven and bake for 25 minutes, or until the cheese is bubbly and golden!
Garnish and Serve: Remove from the oven, let it cool for a few minutes, and garnish with fresh basil before serving.