Please note that I am a lefty so you may want to switch hands from what these pictures show, to tie this knot
This knot starts out like you are tying your shoe laces. Cross the two ends of the string over each other once & once again.
Pull the knot snug, but not tight.
Grasp one side of the strings in the palm of your hand and point the index finger of that hand towards you. Slide the other hand up the other end of the string.
The the string and loop it completely around your index finger.
Begin rotating your index finger and the string wrapped around it so your finger goes from pointing towards you, to pointing away from you.
Here your index finger & the loop of string are twisted around & facing forward.
With your free hand unloosen the loop around your index finger slightly.
Take the other end of the string and pass it through the newly formed loop.
Pull the string completely through the loop & continue pulling on the string to snug up the knot..
Once you’ve snugged up the knot, grab the knot with one hand & the second string with the other. Pull on the second string to tighten up the string going around your food.
After the loop around the food is tight, grab both strings & trim them .