HEAT oven to 375°F. Mix spinach, cream cheese, dressing, eggs and 3/4 cup Cheddar in large bowl. Stir in 1/2 cup cracker crumbs.
SPOON into greased 2-qt. casserole; top with remaining crumbs and Cheddar.
BAKE 20 to 25 min. or until Cheddar is melted and casserole is heated through.