2 teaspoons red wine vinegar
1/2 small red onion or 1 large shallot, very finely minced
1/2 teaspoon sugar
1/4 teaspoons salt and pepper
Small handful fresh basil, torn
Small handful fresh mint, torn
Combine all the ingredients in a small bowl. Set aside for at least 1 hour at room temperature or longer in the fridge. Taste for seasoning, adjusting as needed, and serve at room temperature with tacos.
(I served mine as a side salad, I think it would of been better on something FYI)