Do not overmix the meat mixture to avoid tough meatloaves. Use grated carrot and bell peppers to add moisture naturally. Keep mashed potatoes creamy but not runny to prevent sliding off during baking. Shape meatloaves uniformly for even cooking. Check internal temperature with a meat thermometer to ensure doneness. Let meatloaves rest before serving. For gluten-free, use almond flour or gluten-free breadcrumbs and gluten-free Worcestershire sauce. For dairy-free mashed potatoes, use coconut milk and dairy-free butter. Mashed potatoes can be chilled briefly to firm up before topping. Leftovers store well refrigerated for 3 days or frozen (without mashed topping) for up to 2 months.