Step 1

Heat a medium sized skillet or saucepan over medium heat. Add the pineapple juice, sugar, ketchup, vinegar, Tamari, and sambal oelek. Whisk to combine, then bring to a simmer.

Step 2

In a small bowl, whisk together the cornstarch and cold water to make a slurry.

Step 3

Slowly add the slurry to the saucepan and stir to combine.

Step 4

Bring to a light boil, and boil for approximately 1 minute (or until the sauce has just thickened).

Step 5

Turn off the heat, and stir in the food coloring (if you're using it).