In a small pot over med-low heat, add ketchup, sugar, vinegar, soy sauce, garlic salt, dry chopped onion, and red pepper flakes.

Stir together and bring to a low simmer.

Taste as it cooks down, you can continue to add any of the said ingredients to adjust to your taste.

Simmer untill the you can barley smell/ taste the vinegar. The BBQ Sauce will slightly thicken. You can add water as you go if you feel it is needed.

Stir occasionally.