In a bowl, dissolve yeast and 3/4 teaspoon sugar in 3 tablespoons water. Add remaining sugar and water, oil, egg, salt and 2 cups flour; mix well. Add enough remaining flour to form a soft dough. , Turn onto a floured surface; knead until smooth and elastic, 6-8 minutes. Place in a greased bowl, turning once to grease top. Cover and let rise in a warm place until doubled, about 1 hour., Punch dough down. Shape into 20 balls. Roll each into a 8-in. rope; tie into a loose knot. Place on a greased baking sheet; cover and refrigerate overnight. Allow rolls to sit at room temperature for 45 minutes before baking. , Bake at 375degrees until lightly browned, about 12-15 minutes. Brush with butter if desired. Remove to wire racks to cool.