Penne Pie

Ingredients

• 1 pound penne pasta
• 1 pound ground beef (85% lean)
• 1 tablespoon olive oil
• 1 medium yellow onion, chopped
• 3 large eggs
• 2 cups marinara sauce (homemade or store-bought, I like Rao's)
• 1 cup whole milk ricotta cheese
• ½ cup grated parmesan, plus 2 tablespoons
• 2 tablespoons minced flat leaf parsley
• 1 cup shredded mozzarella
• 1 teaspoon salt
• ¼ teaspoon freshly ground black pepper