The Only Lasagna Recipe You Will Ever Need - Dairy - Kosher Recipe

Ingredients

• 1 onion, diced
• 2 tbsp. oil
• salt
• 2 cloves garlic, crushed
• 3 carrots, peeled and grated
• 3 stalks of celery, peeled and very finely sliced
• 8 oz. fresh spinach
• 4 cups marinara sauce
• 1 lb. ricotta cheese
• 8 oz. muenster cheese, shredded
• 8 oz. mozzarella cheese, shredded
• 12 lasagna noodles (not the oven-ready ones)