My meatloaf recipes are always what ever comes to hand out of the fridge. Someone told me (after I cooked it for the first time and it was dry) that carrot helps in making it moist. So I use minced beef, carrot an egg, onion, any herbs I feel like out of my garden, soy sauce and any other sauces that seem like a good idea at the time, ie a bit of tomato(not too much) I usually make something different every time, but they are always yummy.

hope this helps a little
kate