Tuna Stuffed Potatoes

4 baking potatoes, baked
1/2 cup grated Cheddar cheese
1/4 cup chopped pimento
2 cans tuna, drained
1 cup mayonnaise
1/4 cup chopped green bell pepper
1/4 cup chopped scallion

Cut baked potatoes in half. Scoop the flesh from the potatoes and put into a mixing bowl. Toss lightly with remaining ingredients. Spoon mixture back into shells. Bake for 20 minutes at 400 degrees F.