Heat oven to 350 degrees F. Spray 13x9 glass baking dish with nonstick cooking spray. In very large bowl stir together fiesta cheese soup, cream of chicken soup, sour cream and 1/4 cup melted butter; mix well. Stir in Simply Potatoes and ham. Spread into baking dish.
In small bowl stir together remaining 1/4 cup melted butter and crushed crackers. Sprinkle crackers evenly over top of Simply Potatoes.
Bake, uncovered, 50 to 55 minutes or until edges are bubbly and center is heated through.