Another tip, will they never end?
If your sauce is a bit too sharp / acidic add just a (small) pinch of bicarb and stir till all the bubbles disappear. This means less salt in the final seasoning so be careful. And one more.... never, ever, add sugar to the sauce as the conglomerates do, just empty calories.
Experiment!
Shell, I do similar, I just go with whatever is in the fridge. The veg one I have done is sliced onions, mushrooms, red and yellow pepper chunks, sliced chilli and sprinkled with smoked paprika powder.
There are no rules when you make your own.