Classic Tater Tot Casserole

Name: Classic Tater Tot Casserole
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: American
Ingredients: 28 to 30 ounces frozen tater tots (1 bag); 1 pound lean ground beef; 1 medium yellow onion (diced); 2 cups frozen mixed vegetables (thawed, or fresh diced vegetables); 10.5 ounces condensed cream of mushroom soup (1 can); ⅓ cup milk; ¼ teaspoon dried oregano; ¼ teaspoon dried parsley; salt and black pepper (to taste); 2 cups shredded cheddar cheese (divided )