This is a summer no-cook that checks nearly all boxes for Charlotte. Watermelon, feta, mint, and vinegar are standard at Harris Teeter, Food Lion, and Kroger year-round; rice vinegar may require a quick stop at an Asian section, but most Charlotte chains carry it. The real constraint is seasonality—watermelon peaks June through August locally and is cheapest then, making this a late-spring to mid-summer recipe where a good melon costs $4–6 and feta runs $3–4, landing at roughly $3 per serving when watermelon is in season. The 15 minutes is honest, though cubing watermelon can take longer if you're being precise. It reheats poorly due to the watermelon texture breakdown, so it's firmly a same-meal dish, and the lack of protein makes it a side rather than a weeknight main.