Combine peas, carrots and corn in microwaveable bowl and microwave 2 minutes. Stir and microwave 2-4 additional minutes (until a little warm but not cooked). Drain all liquid that may be in bottom of bowl. Layer on top of beef.
3 Sprinkle cheese on top of vegetables.
4 Combine both mashed potatoes in the bowl you used for the vegetables and stir to combine the flavors. Spread on top of cheese.
5 Bake in 350-degree oven until bubbly. (Usually about 30-40 minutes.)
6 ENJOY!!!