Prepare Beef, Corn & Tomato Layer

1. Heat a 1-2 gallon pot over medium-high heat. Add 2 tsp corn oil and ground beef. Stir occasionally, breaking up large pieces of beef. Cook until beef is almost cooked through, about 4-5 minutes
2. Add onions and cook until translucent, about 2 minutes
3. Add garlic, spices and corn kernels and cook 2-3 minutes, stirring constantly
4. Fold in crushed tomatoes and diced tomatoes, lower heat and simmer 5 minutes

Make Mashed Potato Layer

1. Peel potatoes and cut into quarters for quicker cooking
2. Place potatoes in a pot, cover with cold water and bring to a boil. Lower heat, cover the pot, and simmer until fork tender, about 15-20 minutes
3. Drain potatoes, add butter, milk and seasonings. Mash until smooth

Assemble & Bake

1. Preheat oven to 350º degrees
2. In a 9" x 11" pan add half the potatoes and spread evenly to create a bottom layer. Add beef filling for the second layer. Top with remaining potatoes. Spread evenly and sprinkle shredded cheddar cheese over the top
3. Bake for 20-25 minutes on middle rack, until cheese turns golden brown, rotating the dish halfway through the cooking process
4. Use a wide spatula to serve, making sure to reach down to the bottom potato layer