1 pkg. frozen vegetable blend
1 pkg. Macaroni & Cheese Dinner (the blue box kind)
3/4 cup fat-free milk
1/4 cup Light Zesty Italian Dressing
1 can white tuna in water
1 cup Shredded Sharp Cheddar Cheese
Place vegetables in colander in sink. Cook Macaroni as directed on package; pour over vegetables to drain macaroni and thaw vegetables. Return to saucepan.
Stir in Cheese Sauce, milk and dressing. Add tuna and 1/2 cup Cheddar; mix well. Spoon into 2-qt. casserole; cover.
Bake 35 min. or until heated through. Top with remaining Cheddar; bake 3 to 4 min. or until melted.