If you want to make it from scratch, just grab a saucepan and add;
1 1/2 cups water
1 t corn starch
Stir until dissolved. Add;
1/2 a can of tomato paste (use 3 oz.)
1 1/2 T vinegar
2 t chili powder
1 t salt
1/2 t cayenne pepper
Heat to a boil, reduce heat and simmer about 5 minutes, stirring every so often. Cool. I store ours in a pint sized Mason jar in the refrigerator.
