Spinach Artichoke Chicken

Ingredients: 4 boneless, skinless chicken breasts Salt and pepper, to taste 2 tablespoons olive oil 3 cloves garlic, minced 1 can (14 ounces) artichoke hearts, drained and chopped 5 ounces fresh spinach, roughly chopped 1/2 cup mayonnaise 1/2 cup sour cream 1/2 cup grated Parmesan cheese 1/2 cup shredded mozzarella cheese