Shepherd's Pie

1 lb ground beef
1 med onion, chopped
1 12oz bag frozen vegetables
2 C diced tomatoes with Italian herbs
1 12oz jar beef gravy

1 3/4 C water
2 Tbsp butter
1/4 tsp garlic powder
1/2 C milk
2 1/4 C Betty Crocker Potato Buds mashed potatoes
1/4 C Parmesan cheese
1 egg

Heat oven to 375
Spray large skillet with cooking spray. Cook beef and onion over med heat until beef is completely cooked.
Add frozen veggies, tomatoes, and gravy. Heat to boiling. Reduce heat to med-low, cover, and cook 10 more minutes.
In 2 quart saucepan, heat water, butter, and garlic powder to boiling. Remove from heat. Add milk. Stir in potatoes and parm cheese. Add egg and blend well.
Pour beef mixture in to 2 quart glass baking dish. Spoon mashed potatoes over beef.
Bake 20 to 25 minutes or until potatoes are set and mixture is thoroughly heated.