Add the water, salt and cream of tartar to a Thermomix® mixing bowl and cook for 5 minutes at 50 degrees F on speed 1. Let cool for 10 minutes.
Add the flour and oil and knead for 1 minute. Let cool, then add food colorings.
*If using stove top, add all ingredients except the oil and mix on medium heat until thick, then let cool. Knead in the oil and add the food colors.