*** Cream butter until soft in a blender or food processor. Add cheese and mix well. Sift flour, salt and mustard together. Crush sage. Add all ingredients. Form mixture into a dough using your hands. Roll onto a floured board until a quarter inch thick. Cut into 2 inch rectangles. Place on an ungreased cookie sheet. Bake in 350F oven for 12 minutes or until brown on edges. Cool on rack. Straws are crisp and break easily.