Mushroom and Beef Lasagna Casserole

Ingredients

• 2 tablespoons of vegetable oil
• 1 medium onion, minced
• 2 garlic cloves, crushed
• 1 medium carrot, diced
• ¾ cup canned tomatoes
• 8 ounces of mushrooms, chopped
• 1 pound ground beef
• salt
• pepper
• ½ cup red wine
• 2 tablespoons of tomato paste
• 1 teaspoon worcestershire sauce
• ⅓ cup tomato sauce
• 2 teaspoons of mixed herbs
• 1 ounce butter
• ⅔ cup flour
• 1 cup milk
• ⅔ cup parmesan, grated
• 4 ounces of baby spinach
• 3 ounces of cooked lasagna sheets (4 sheets)
• ⅓ cup gruyère cheese, grated