1/3 c. vegetable oil
1 (8 oz.) carton plain low-fat yogurt
1/2 c. sugar
2 pkgs. dry yeast
1/2 c. warm water (105 to 115 degrees)
1 egg
1 egg white
4 c. all-purpose flour
1 tsp. salt
Butter-flavored vegetable cooking spray

Combine first 3 ingredients; set aside. Dissolve yeast in water in a large mixing bowl; let stand 5 minutes. Stir in yogurt mixture, egg, and egg white.

Combine flour and salt. Stir 2 cups flour mixture into yogurt mixture; beat at medium speed of an electric mixer until smooth. Gradually stir in remaining flour mixture. Cover and refrigerate 8 hours.

Punch dough down, and divide into 4 equal parts. Roll each into a 10 inch circle on a floured surface; coat with cooking spray. Cut each circle into 12 wedges; roll up each wedge, beginning at wide end. Place on baking sheets coated with cooking spray, point side down.

Cover and let rise in a warm place (85 degrees), free from drafts, 45 minutes or until doubled in bulk. Bake at 375 degrees for 10 to 12 minutes or until golden brown.