Step 1

Preheat oven to 375°F. To keep this a one-pan recipe, cook the filling in a 10-inch cast-iron skillet, or oven-safe skillet.

Step 2

In the skillet, over medium heat, melt butter and heat the olive oil. Once hot, add onion, celery, and carrot. Cook for 3-4 minutes, and add a pinch of salt to begin layering in the flavor.

Step 3

Add garlic and season with salt, pepper, and red pepper flakes, to taste. Stir and cook for another 3 minutes, until all the veggies are tender. Stir in frozen peas and corn.

Step 4

Remove from heat. Stir in the parsley and cream of mushroom soup until fully combined.

Step 5

If cooking in the same skillet, spread the filling evenly across the pan. Otherwise, transfer to a 3-quart baking dish. Sprinkle both kinds of cheeses on top. Then, line the tater tots across the entire top of the hotdish.

Step 6

Bake for 28-33 minutes until bubbly and tater tots are golden brown. Let sit 2-3 minutes before serving. Store any leftovers in an airtight container in the fridge for up to 4 days.