1 cup bread flour
2 teaspoons sugar
1 package dry yeast
3/4 cup warm water (120-130¼F)
Lightly spoon flour into a dry measuring cup; level with a knife.
Place all the ingredients in a food processor, and process for 1 minute or until well-blended.
Spoon mixture into a medium bowl; cover and chill sponge for 2 to 24 hours.