Try served over grilled halibut or seared prawns.

2 limes
2 mangoes, diced
4 to 5 radishes, diced
1 red onion, diced
1 tablespoon chili powder
1/2 bunch fresh cilantro leaves, chopped
1/4 cup extra-virgin olive oil
Kosher salt and freshly ground black pepper

Mix all the ingredients together and serve.