Get a small pot. Dice a large onion. 1-2tbsp butter on medium heat. When melted, add onions. cook for 5-10 mins, depending on how much you like your onions cooked/browned. Add 1 TBSP balsamic vinegar 1 Tbsp brown sugar 2 Tbsp water salt and pepper to taste 6 Tbsp Ketchup 1 Tsp Tabasco sauce. Increase heat to med-high and boil 6-8 mins to thicken while stirring, if it starts burning to the bottom, reduce heat. If too watery, cook longer. Spoon onto food while still warm or put into a jar or container and allow to cool to room temperature before refrigerating.