Prepare all fresh ingredients: dice the pineapple and mango into approximately 1/4-inch pieces. Finely mince the red onion and jalapeño, ensuring the jalapeño is deseeded for less heat.

In a medium mixing bowl, combine the diced pineapple, mango, minced red onion, minced jalapeño, and chopped cilantro.

Pour the fresh lime juice over the fruit and onion mixture. This will brighten the flavors and prevent browning of the fruit.

Sprinkle with salt and black pepper. Gently fold all the ingredients together until they are evenly distributed and coated with the lime juice.

For the best flavor, cover the bowl and chill the salsa in the refrigerator for at least 15 minutes to allow the flavors to meld. Taste and adjust seasoning (add more salt or lime juice if necessary) before serving.

Serve chilled with tortilla chips, or use as a topping for tacos, grilled chicken breasts, or white fish.