the watermelon and feta thing that keeps saving my lunches

Right so I've made this about four times in the last two weeks and it genuinely hasn't got old. Watermelon, feta, cucumber, a handful of mint, drizzle of olive oil, squeeze of lime. That's basically it. Takes maybe eight minutes if you're being generous about how long it takes to cube watermelon. The thing is it actually keeps better than I expected — made a big batch Sunday, had it Tuesday and it was still fine. The watermelon goes slightly softer but honestly that's not a dealbreaker when you're pulling it out of the fridge at 12:30 and you've got a call at 1. I've been adding a bit of red onion too, thin sliced. Just makes it feel more like an actual lunch rather than a snack.