Step 1

Preheat the oven to 350 degrees F.

Step 2

Lightly grease a 9x13-inch baking dish.

Step 3

Bring a large saucepan of salted water to a boil.

Step 4

Add the potatoes to the boiling water and cook until tender but still firm, about 15 minutes.

Step 5

Drain the water from the pot and mash the potatoes.

Step 6

In a large skillet over medium-high heat, add the beef and the onion, cooking until the beef is browned and the onion is tender, about 5-7 minutes.

Step 7

Drain the fat from the meat mixture and crumble the beef.

Step 8

Stir the carrots, the green beans, the cream of mushroom soup, and the condensed tomato soup into the meat mixture.

Step 9

Pour the meat mixture into the prepared baking dish and top with the mashed potatoes.

Step 10

Sprinkle the potatoes with the cheese.

Step 11

Bake, uncovered, until the potatoes are lightly browned, about 30 minutes.

Step 12

Serve.