Preheat the oven to 425°F. While it's heating, place the pie crust in a deep 9-inch pie dish. Poke a bunch of holes in the crust using a fork to prevent bubbling, then pre-bake the crust for 7 minutes.
Pie crust
While the pie crust pre-bakes, place the ground beef and burger seasoning in a large skillet and brown the beef.
1.5 lb. Ground beef, 3 Tablespoons Burger seasoning
Add the can of tomatoes and chilies. Cook for another 2 minutes and drain the liquid. Alternative: Keep cooking the beef and tomatoes together until the liquid has significantly reduced and is thick and saucy, and leave it in.
1 can Diced tomatoes and green chilies
Add the ground beef mixture to the baked pie crust, and top with the prepared mashed potatoes in a smooth layer. Sprinkle on the salt and pepper, then top the entire thing with plenty of shredded cheese.
8 oz Cheddar cheese, 2 cups Mashed potatoes, Salt and pepper
Place in the oven and bake another 10 minutes, until heated through, melted, and bubbly.
Remove from the oven, top with fresh tomato slices, and serve!
1 medium Tomato