Ham and Cheese Potato Casserole

Got this from a blog. Had it tonight and it is really good and very easy.

• 1 can (10-3/4 ounces ) condensed cream of celery soup, undiluted
• 1 cups (16 ounces) sour cream
• 1/4 cup water
• 1/4 teaspoon pepper
• 1 package (28 ounces) frozen O’Brien potatoes
• 8 ounces of process cheese (Velveeta), cubed
• 1-1/4 cups cubed fully cooked ham

1. In a large bowl, combine the soup, sour cream, water and pepper.
2. Stir in the potatoes, cheese and ham.
3. Transfer to a greased 11-in. x 7-in. baking dishes. Cover and bake the remaining casserole at 375° for 40 minutes. Uncover and bake 10-15 minutes longer or until bubbly. Let stand for 10 minutes before serving. Yields 5 servings.