8 ounces medium shells, elbows or other
    medium pasta shape, uncooked
2 teaspoons vegetable oil 
1/2 teaspoon ground cumin 
Salt to taste 
1 (15 ounce) can black beans, rinsed and drained 
1 (11 ounce) can whole kernel corn, drained 
1 red bell pepper, seeds and ribs removed, cut into strips 
3/4 cup sliced green onions 
1 (2 1/4 ounce) can sliced black olives, drained 
3/4 cup mayonnaise (can use non-fat or lite) 
1/2 cup sour cream (can use lite or non-fat) 
1/4 cup plus 2 tablespoons hot or mild salsa 
2 tablespoons minced fresh cilantro or parsley