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In page Lasagna:

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In other regions, lasagna can be made with various combinations of ricotta or mozzarella, tomato sauce, meats (such as ground beef, pork, veal or chicken), and vegetables (such as spinach, zucchini, olives, and mushrooms), and the dish is typically flavoured with wine, garlic, onion, and oregano. In all cases, the lasagne are baked (al forno).[citation needed]