Preheat Oven to 400 degrees.
Spray the edges of a 9x13" casserole dish with cooking spray to prevent sticking
Begin by browning ground turkey in a skillet over medium heat until cooked through. No pink should be remaining. Drain off any remaining liquid & discard.
Add the chopped onion, sliced bell pepper, chopped mushroom, and chopped celery and continue to cook until onion becomes translucent.
Once cooked, add to the bottom of a 9x13" casserole dish and spread evenly across the bottom of the dish.
Spread cans of soup evenly across the top of the meat & vegetable mixture, and cover completely.
Top with tater tots placed in the soup in an even layer, and cook for 35 minutes in the 400 degree oven.
Once the tots have browned, remove the dish, sprinkle the 1 cup cheddar cheese mixture over the top and put back into the oven until the cheese is melted, about 5-10 more minutes.
Allow to cool, and enjoy!