Cheesy Chipotle Sour Cream au Gratin Potatoes

Ingredients:
- 4 cups ORE-IDA Diced Hash Brown Potatoes
- 1 can (10-3/4 oz.) condensed cream of celery soup
- 1 pkg. (8 oz.) KRAFT Shredded Cheddar & Monterey Jack Cheeses
- 1/2 cup BREAKSTONE'S or KNUDSEN Sour Cream
- 1/4 cup chopped onions King Sooper's 1 lb For $0.99 thru 02/09
- 1 chipotle pepper in adobo sauce, chopped
- 2 plum tomatoes, chopped

Directions:
- Heat oven to 350F.
- Mix ingredients.
- Spoon into 2-qt.
- casserole sprayed with cooking spray.
- Bake 55 min.
- to 1 hour or until heated through and golden brown around edges.