Mexican Vegetarian Quiche

Name: Mexican Vegetarian Quiche
Ingredients: ¾ cup white whole-wheat flour; ¾ cup all-purpose flour; ¼ teaspoon salt; 2 tablespoons cold butter; 2 tablespoons sour cream; 2 tablespoons extra-virgin olive oil; 2-3 tablespoons ice water; 2 teaspoons extra-virgin olive oil; 2 cups diced onions; 1/8 teaspoon salt plus 1/4 teaspoon, divided; 2 tablespoons water; ¾ cup corn; ½ cup quartered cherry tomatoes; 1/3 cup chopped pickled jalapeños; ½ cup shredded Jack cheese; 4 large eggs; 2 large egg whites; ¾ cup low-fat milk; ¼ cup sour cream; ¼ teaspoon freshly ground pepper