Moussaka | America's Test Kitchen

Ingredients

• 3½ pounds eggplant , cut into ¾-inch cubes
• ½ cup plus 2 teaspoons plus 3 tablespoons extra-virgin olive oil , divided
• 2 teaspoons table salt , divided
• ¾ teaspoon pepper , divided
• 1½ pounds Yukon Gold potatoes , unpeeled, sliced crosswise ¼ inch thick
• 1 tablespoon extra-virgin olive oil
• 1 onion, chopped fine
• ½ teaspoon table salt
• 4 garlic cloves , minced
• 1 tablespoon tomato paste
• ½ cup dry red wine
• 2 teaspoons paprika
• 2 teaspoons dried oregano
• ½ teaspoon red pepper flakes
• ¼ teaspoon ground cinnamon
• 1 pound 80 percent lean ground beef
• 1 (14.5-ounce) can crushed tomatoes
• 2 teaspoons red wine vinegar
• 6 tablespoons unsalted butter
• ½ cup all-purpose flour
• 2½ cups whole milk
• 4 ounces kasseri cheese , shredded (1 cup)
• ¼ teaspoon table salt
• ⅛ teaspoon ground nutmeg
• 3 large egg yolks , lightly beaten