Sprinkle yeast into 1/4-cup warm water. Let stand 5-10 minutes to soften. Using a large mixing bowl beat egg whites slightly; add oil and sugar and blend. Add yeast, salt and 1 cup warm water. Stir in flour gradually, using a wire whisk or wooden spoon to mix well. Refrigerate dough at least overnight, but it may be left in refrigerator for several days. Shape dough into 36 balls or into shape you prefer. Place on a lightly floured surface and let rise for 2 hours. Preheat oven to 375 degrees and bake rolls for 10 minutes and serve immediately.