Add salt and pink food coloring to boiling water and add to 2 cups of flour. Mix until a rough dough forms. Wrap dough in plastic wrap and let rest for 30 minutes. Unwrap and remove about 3 tbsp. of dough from the pink dough and add red food coloring to this small amount. Knead until the red food coloring is incorporated. Knead the larger pink dough for 5 minutes or until a smooth dough forms. Form a log and cut dough into small amounts that can easily be rolled into a thin disk.