In a large bowl add egg, onion, Italian seasoning, tomato paste, panko, 2 Tbsp milk, parsley, and ground beef. Mix everything together until evenly combined. Form the mixture into 6 mini meatloaves. Scoot the potato packet to the left side of the pan. Add the meatloaves to the middle of the hot pan. Spread the ketchup evenly over the loaves. Return the pan to the oven, baking for 23-25 minutes. Take the pan out, and use a paper towel to sop up any grease.