Cucamelons look like miniature watermelons no bigger than a grape, but bite into one and you get a crisp, tangy flavor closer to cucumber with a splash of citrus sourness. Also called Mexican sour gherkins or mouse melons, they've been grown in Mexico and Central America for generations, long before they became a trendy garnish at farmers markets.

Here's what's actually true about this odd little fruit, from its botanical roots to how to grow a batch on your own patio.