Place Potatoes In A Lightly Greased 5-Qt. Slow Cooker; Sprinkle With Salt And Pepper. In A Large Skillet, Cook Beef And Onion Over Medium Heat Until Meat Is No Longer Pink; Drain. Spoon Over Potatoes. Top With Vegetables. Combine Soup And Milk; Pour Over Vegetables. Cover And Cook On Low For 4 To 4-1/2 Hours. Top With Cheese; Cover And Cook 30 Minutes Longer Or Until Cheese Is Melted. Just Before Serving, Sprinkle With French-Fried Onions.