Wash and hull the strawberries, chop them into bite-sized pieces. Prepare the pineapple by cutting it into similar-sized cubes.

In a large mixing bowl, add the chopped strawberries and pineapple. Dice a jalapeño, and sprinkle it into the bowl. Chop red onion finely and add it, along with chopped cilantro if desired.

Gently stir all the ingredients until evenly combined, keeping the mixtures visually appealing.

Taste the salsa and adjust flavors with lime juice or more diced jalapeño as per preference.

Serve the salsa immediately with tortilla chips or as a topping for grilled meats, or store in an airtight container in the refrigerator.