Moussaka

• 8 eggplants
• 3 eggs
• 1 clove garlic
• 1 tomato sauce for moussaka
• 850 gr lamb (lean ground)
• 160 ml beef stock
• 80 gr mushrooms (sliced)
• 80 gr onion (finely chopped)
• 45 gr tomato paste
• 30 ml olive oil