Personal-Size Cheeseburger Meatloaves

1 1/4 pounds ground beef
1 egg, lightly beaten
3/4 cup milk
1 cup shredded sharp Cheddar cheese
1/3 cup grated or minced onion
1/2 cup oats (I use old-fashioned oats; could use quick oats or substitute Panko or bread crumbs)
1/2 tablespoon Worcestershire sauce
1 teaspoon kosher salt and a few turns of the pepper mill

Preheat oven to 350 degrees.
In a large bowl, combine the egg, milk, cheese, onion, oats, Worcestershire, salt and pepper. Add the ground beef, mixing until just combined, and form this mixture into eight miniature meatloaves. (See note.) Place these on a lightly greased or parchment covered rimmed baking sheet.
In a separate small bowl, combine the ketchup, Dijon, and brown sugar and spread over each meatloaf.
Bake, uncovered, at 350 degrees for 20 minutes or until internal temperature reaches 160 degrees.

For uniform-size meatloaves, press mixture into a lightly greased, half-cup measuring cup or 4-ounce ramekin then invert onto baking sheet. From this mixture, I got eight mini loaves that weighed between 4 and 4 1/4 ounces--like a quarter pound burger.
You can also use this trick if baking as one large loaf. Press mixture gently into a loaf pan and invert onto baking sheet. This way, you have a perfectly shaped loaf and the extra fat from the meat can drain off while cooking. In my oven, this recipe cooks in 55-60 minutes when baked as one loaf.