Sausage Potato Casserole

Ingredients

• 1 pound bulk pork sausage
• 1 can (10-3/4 ounces) condensed cream of mushroom soup, undiluted
• 3/4 cup whole milk
• 1/4 cup chopped onion
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• 3 cups thinly sliced peeled potatoes (about 1-1/4 pounds)
• 1 cup shredded cheddar cheese