Roll each roll into a 7- to 9-inch pointed rope. Define fingernail on pointed end and knuckles and lines along the finger with a sharp knife. Place on a sprayed baking sheet and pinch finger thinner on both sides of knuckle.
Brush finger with butter, avoiding fingernail. Sprinkle cheese and garlic salt on finger, but not on nail.
Make nail color by combining egg yolk and food coloring to achieve desired color. Paint nail with small paintbrush. Bake at 350 degrees for 10-15 minutes, or until lightly browned.