1. Heat oven to 375°F. Add Macaroni to large saucepan boiling water; cook 6 minutes or until tender. Drain. Stir in milk and Cheese Sauce Mix.
2. Pour into greased 8-inch square baking dish. Mix tomatoes and dressing. Top macaroni mixture with tomato mixture. Drizzle butter over cracker crumbs; toss with fork. Sprinkle over tomatoes.
3. Bake 15 minutes or until heated through and crumbs are golden.