Servings: at least 8.  

2.5 lbs. lean ground beef 2.5 lbs. lean ground beef
2 medium onions, chopped (about 3 cups) 2 medium onions, chopped (about 3 cups)
1 T. worcestershire sauce 1 T. worcestershire sauce
3/4 Cup water ¾ Cup water
16 oz. bag of frozen mixed vegetables, defrosted in the microwave 16 oz. bag of frozen mixed vegetables, defrosted in the microwave
2 cups prepared mashed potatoes, can go up to 3 cups 2 cups prepared mashed potatoes, can go up to 3 cups
3 cups shredded cheddar cheese 3 cups shredded cheddar cheese
salt and pepper to taste salt and pepper to taste

Preheat oven to 350 degrees.
Cook ground beef with onions until beef is no longer pink.  Drain if there is alot of grease.
Add worcestershire sauce and water.
Bring to a simmer and reduce heat to low.  Cook uncovered for ten minutes, adding more water, if needed.
Add defrosted vegetables to the meat mixture.
Spray 9" x 13" pan with nonstick spray and spread beef-onion-vegetable mixture in a even layer in pan.  Spread mashed potatoes on top of beef mixture.  Top with shredded cheddar cheese.
Bake until browned and bubbly, about 30 minutes.

19Apr2020-  This sure looked and smelled good.  I made homemade mashed potatoes.  19Apr2020-  This sure looked and smelled good.  I made homemade mashed potatoes.