Pastitsio (Greek Lasagna)

Ingredients (18)

• BECHAMEL SAUCE:
• 6 tablespoons unsalted butter
• ¾ cup all-purpose flour
• 1 quart whole milk,
• 1½ teaspoons salt
• 3 large eggs
• MAIN DISH:
• 4 tablespoons unsalted butter
• 2 medium onions,
• 2 pounds 90% lean ground beef
• ⅛ teaspoon ground cinnamon
• salt and pepper,
• ½ cup water
• 2 tablespoons tomato paste
• 1 pound ziti pasta
• 3 large eggs,
• 1½ teaspoons salt
• 12 to 16 ounces Kasseri or Kefalotiri cheese,