potato topped meatloaf, mom's

Ingredients For potato topped meatloaf, mom's

• 1 1/2 lb

  hamburger
• 1/2 c

  bread crumbs
• 1/4 c

  chopped onion
• 1

  egg, well beaten
• 1/4 c

  ketchup
• 1 1/2 tsp

  salt
• 1/2 lb

  cheddar cheese, in 1/4" pieces
• 3/4 c

  mushroom stems and pieces, drained
• 1/8 tsp

  pepper
• 2 c

  mashed potatoes, hot