1. Preheat oven to 400 degrees F. Saute onion until just translucent. Add in mushrooms, and saute additional 2 minutes. Add in frozen crumbles, soy sauce, garlic salt, and black pepper. Heat thoroughly.
2. Spoon mixture into 9x13" dish. Top with frozen tater tots. Mix together dry soup mix, broth, sour cream, and corn starch in pot. Bring soup mixture to a boil. Reduce heat to medium-low, and simmer until slightly thickened, stirring constantly. Pour soup mixture over tater tots.
3. Sprinkle French fried onions and/or shredded vegan cheddar cheese on top, if desired. Bake 30-35 minutes or until tater tots are golden brown.
Source of recipe: This recipe was inspired by a dish my grandmother cooked often years ago.