Pour ½-1 cup of water (depending on the size of your mason jar), 2 tablespoons of white vinegar and ½ teaspoon of food coloring into each mason jar. The jar should be no more than ½ way filled with liquid.
Put 2-3 eggs in each mason jar, depending on the size of the jar.
Put mason jars with eggs and liquid into the Ninja Foodi liner.
Close the lid and make sure that the valve is on “seal.” Cook on high pressure for 5 minutes. Once timer beeps, allow pressure to naturally release for 5 minutes and then quick release remaining pressure and remove lid.
Using tongs, carefully remove eggs from mason jars and place in a bowl of ice for 5 minutes.