Meatloaf Is the Way to My Heart As Long As It Has Kick and Potatoes Are Around

Name: Meatloaf Is the Way to My Heart As Long As It Has Kick and Potatoes Are Around
Ingredients: 1 1/2 cups ketchup; 1 1/2 teaspoons apple cider vinegar; 2 tablespoons sriracha hot chili sauce; 2 tablespoons Worcestershire sauce; 1 egg; 2 teaspoons salt; 1/2 teaspoon freshly ground black pepper; 1 teaspoon sweet paprika; 4 cloves garlic, grated (on a rasp); 8 sprigs fresh thyme, leaves stripped and chopped; 1/2 cup chopped Vidalia onion; 1 scallion, minced; 1 pound ground chuck, divided; 1 pound ground dark meat turkey, divided; 2 slices potato bread, lightly toasted and cut into 1/4-inch cubes, divided; Special equipment: 9 by 5-inch loaf pan