Tater Tot Casserole

Who doesn't love this its an easy dinner that pleases everyone!
It has creamy hamburger with green beans on the bottom layer with cheese layered on top with tater tots.

1 pnd. burger
1/2 c. onion chopped
1 can cream of mushroom soup
1 can green beans
1 c. grated sheddar cheese
1/2 c. sour cream
1 small package tater tots

brown burger and onions with salt and pepper, add remaining ingredients except tater tots until warm. place in baking dish with tater tots on top, bake according to tater tot directions.