Sourdough rolls

Ingredients

• 1 cup sourdough starter
• 1 1/2 cups warm water
• 1 tablespoon yeast
• 1 tablespoon salt
• 2 tablespoons white sugar or 2 tablespoons brown sugar
• 2 tablespoons olive oil
• 3-4 cups flour (I use 1/2 white and 1/2 whole wheat.)
• butter, melted