Mom's Microwave Meatloaf

1 1/2 lbs hamburger
1/2 cup breadcrumbs or crushed crackers
1 egg
3/4 cup milk
1/4 cup finely chopped onions
1 1/2 tsp salt
1/4 tsp pepper
1/2 cup ketchup

Mix beef with breadcrumbs, milk, egg, onion, salt and pepper. Pat into 2 qt glass loaf pan. Cover with wax paper.
Microwave 5 minutes.
Top with ketchup, replace wax paper and cook an additional 15 minutes, check frequently as the ketchup will start to burn.