Keto Italian chicken bake casserole

Ingredients:

• 4 boneless, skinless chicken breasts
• 1 cup marinara sauce (look for one with low sugar content or make your own)
• 1 cup shredded mozzarella cheese
• 1/2 cup grated Parmesan cheese
• 1/2 cup sliced black olives (optional)
• 1/2 cup sliced mushrooms (optional)
• 1/2 teaspoon garlic powder
• 1/2 teaspoon dried oregano
• 1/2 teaspoon dried basil
• Salt and pepper to taste
• Fresh basil leaves for garnish (optional)