1 1/2 cups all-purpose flour
Kosher salt and freshly ground black pepper
1/4 cup milk
2 large eggs
2 cups panko breadcrumbs
4 boneless, skinless chicken breasts
5 tablespoons butter
5 tablespoons olive oil
8 ounces mozzarella, sliced
2 cups red and yellow cherry tomatoes
6 cups fresh baby spinach
3 cloves garlic, minced