Preheat your oven to 375°F.
Heat olive oil in large skillet.
Brown ground beef with diced onions.
Season meat with salt and pepper.
Drain excess fat from beef mixture.
Layer sliced potatoes in baking dish.
Add frozen vegetables over potatoes.
Spread cooked beef mixture on top.
Mix soup with beef broth.
Pour soup mixture over casserole.
Sprinkle cheese evenly across surface.
Cover tightly with aluminum foil.
Bake for 35-40 minutes total.
Remove foil during last 10 minutes.
Let rest for 5 minutes.