Step 1

Brown the ground beef with the onion and drain the grease.

Step 2

Scrub the potatoes and slice them thinly.

Step 3

Grease a 9x13" pan and layer the beef/onion mixture and then the potatoes.

Step 4

In a small bowl, whisk the cream of mushroom soup, milk, and sour cream. Pour over the potato layer.

Step 5

Sprinkle with pepper

Step 6

Grate Cheddar cheese and sprinkle over the top.

Step 7

Crush the corn flakes and layer them over the top of everything.

Step 8

Bake in a preheated 350 degree oven for 90 minutes or unit the potatoes are fork-tender.