Preheat oven to 300 degrees. Remove the crusts from a loaf of white bread. Gently crumble it into coarse crumbs either with your hands, or a food processor. Spread crumbs onto a cookie sheet. Dry bread crumbs in the oven 7-10 minutes stirring after the first 5 minutes. Cool completely and store a cool dry place for up to 3 months.