This is an easy method to get good ferments into your diet.
Peel and core pineapple. Chop pineapple, red pepper and onion into 1/4" to 1/2" pieces. Dice garlic and jalapeño pepper. Mix chopped veggies and remaining ingredients together in a bowl.
Transfer to wide mouth canning jars and place a glass weight on top of salsa. Press down a bit to encourage juice to rise and cover the chopped ingredients. (If you don't have enough natural juice, add a few tablespoons of distilled water to cover the ingredients.)
Whey can help the fermentation process along a little bit faster, If you don't have whey, add an extra teaspoon of salt.