Bring 4 quarts of water to a boil water in a large pot.
Add 1 TBSP of salt to the pot.
Add pasta. Stir it then test the pasta by tasting it. Drain the pasta next.
Pour pasta into a collander to drain. Rinse in cool water.
In a large zip lock bag add 2 TBSP of water and about 10-20 drops of food coloring. Shake to blend the color int the sealed bag.
Pour the cooled spaghetti into the bag with the food coloring. Seal the bag. Gently with your hands combine the spaghetti and food coloring by shaking the bag or kneading the bag.
Allow the filled bag to sit for 1 minute.
Dump the colored spaghetti back into the colander rinsing with cold water to remove any excess coloring.
Transfer spaghetti to a bowl.