Slow-Cooker Tater Tot Casserole

Ingredients

• 2 pounds ground beef
• 1 large onion, chopped
• 1 pound sliced fresh mushrooms
• 3 garlic cloves, minced
• 2 cans (10-3/4 ounces each) condensed cream of mushroom soup, undiluted
• 1/2 teaspoon salt
• 1/2 teaspoon pepper
• 1 pound frozen cut green beans
• 1 bag (32 ounces) frozen Tater Tots
• 1 cup shredded cheddar cheese