Place hamburger and the diced onion into a pan. Shake some seasoned salt and pepper on top of mixute and fry until brown. Drain grease. Transfer hamburger into 9 x 13 baking pan stir in cans of cream of mushroom soup. Then top with the tater tots, add seasoned salt and pepper on top. Bake at 350 degrees for about 50-65 minutes or until tatertots turn golden brown on top.