Add 1 Tbsp of butter/oil to a large skillet or pot over medium-high heat. If using cooking spray, spray a little bit in the pan. Note: if you are using a large cast iron skillet in place of the 9x13 baking dish, use the skillet here. 4 Tbsp Melted Butter or Oil
Add the hot dog rounds and sauté for 1-2 minutes to let them get some color.
2 Lbs Hot Dogs
Add the diced onion to the same pan and sauté another 2-3 minutes. Season with a heavy pinch of salt and pepper.Note: If you like raw onion on your chili dogs, reserve a handful for the end of cooking. 1 Large White or Yellow Onion, Salt and Pepper to Taste
If using the baking dish, grease it now, with a thin layer of butter, oil or cooking spray.
Preheat your oven to 350 degrees F.
Taste the hotdogs and onions for salt and pepper.
If using the baking dish, add the hotdog/onion mixture to the dish. Spread evenly across the bottom. If using the cast iron skillet, simply leave the mixture in the skillet. If you are using (optional) mustard and/or ketchup, drizzle it over the onions and hot dogs. Note: you can also serve the mustard ketchup on the side. Up To 1/2 C Mustard and/or Ketchup
Layer the chili evenly over the top.
1 15 Oz. Can Chili
Layer the soups (and nacho cheese, if you are using it) over the top of the chili. I usually spoon them evenly over the top of the chili and them spread them with the spoon to fill in the gaps. They don't need to be mixed perfectly. 1 10.75 Oz. Can Condensed Cheddar Soup, 1 10.75 Oz. Can Cream of Chicken Soup
Top the soups evenly with the grated cheese, reserving a handful for the end of cooking.
8 Oz. Cheddar or Colby Jack Cheese, Grated
Layer the tater tots over all of this in whatever design you like.
2 Lbs Frozen Tater Tots
Brush the remaining butter/oil over the tots to help them brown up as they bake. You can also drizzle the butter/oil over them, or toss them in the butter/oil before layering. If you have cooking spray, you can spray them with that instead of the butter/oil. Bake this dish at 350 degrees for 40-45 minutes, until the tots are crispy, the cheese is melted and everything is heated through.
Remove from the oven and sprinkle with a little salt and pepper, if desired. Top with the reserved onions and cheese.
Let the hotdish rest for 5-10 minutes before serving.