Lasagna with Eggplants - Cook with Sousou

Ingredients

• 12 pieces green lasagna, pre-cooked
• 3 tablespoons oil
• salt and pepper
• 1 tablespoon oregano
• 1 tablespoon tomato paste
• 1 cube magi
• 3 big eggplants, peeled and cut into round pieces
• 1 cup water
• 1 kg tomatoes, peeled and diced
• ¾ cup leek, chopped
• 1 carrot, diced
• 2 garlic cloves, smashed
• 2 mediums onions, diced
• tomato sauce
• 300 g shredded gruyere cheese
• 4 cups milk
• 2 tablespoons flour
• salt, white pepper and nutmeg
• 200 g feta cheese
• 500 ml fresh cream