Florentine Meatloaf

Name: Florentine Meatloaf
Ingredients: 1 tablespoon olive oil; 1 cup onion, finely chopped; 1 garlic clove, large, finely minced; 1⁄2 teaspoon fennel seed; 1 (10 ounce) package frozen chopped spinach, thawed and squeezed dry; 1 lb lean ground beef; 1⁄2 lb Italian sausage (hot or sweet); 1 cup ricotta cheese; 1⁄2 cup tomato juice (preferably fresh) or 1⁄2 cup beef stock; 1 large egg; 1⁄2 cup fresh breadcrumb; 1⁄4 cup parmesan cheese, freshly grated; 2 tablespoons fresh parsley, minced; 2 tablespoons fresh basil, minced; 1⁄2 teaspoon salt; 1⁄2 cup marinara sauce (optional)