For a meatless meal, omit the ham and add your favorite vegetable instead.
Prick potatoes all over with fork.
Arrange in microwaveproof dish and microwave on High 15 to 18 minutes, turning halfway through, until tender. Mash cooked potato with cottage cheese in bowl. Stir in ham, Cheddar, onions, salt and pepper. Spoon mixture into shells. Bake 20 minutes.