Rich Greek Moussaka with Béchamel and Eggplant - Yummy Gusto

Ingredients

• 2 large eggplants, sliced into 6 mm rounds
• 500 g ground lamb or beef
• 1 large onion, finely chopped
• 2 cloves garlic, minced
• 2 tablespoons tomato paste
• 1/2 teaspoon ground cinnamon
• 50 g unsalted butter
• 40 g all-purpose flour
• 500 ml whole milk
• 1/4 teaspoon ground nutmeg
• Salt to taste
• 40 g grated Kefalotyri or Parmesan cheese
• 2 tablespoons olive oil