4 lbs. potatoes
1 med. onion, chopped
1/2 med. green pepper, chopped
4 med. carrots, pared, thinly sliced
1/3 c. chopped canned pimentos
1 c. mayonnaise
1 tsp. salt
1 tbsp. lemon juice
Chili powder
1 med. head lettuce, shredded