Tater Tot Casserole (Tater Tot Hotdish)

Name: Tater Tot Casserole (Tater Tot Hotdish)
Prep time: 10 min
Cook time: 50 min
Total time: 1 h
Cuisine: American
Ingredients: 1 tbsp cooking oil; 1 lb ground beef ((Note1)); ½ medium yellow onion (finely diced); 4 heaping cup tater tots (frozen (Note2)); 2 clove garlic (crushed); ½ tbsp beef bullion powder ((Note3)); 1 tbsp Worcestershire sauce; ½ tsp Italian seasoning; 10.5 oz canned cream of mushroom soup ((Note4)); 1 cup frozen mixed vegetables; 1 cup grated cheese (divided (Note5)); ¼ cup grated parmesan cheese (divided); salt n pepper