Place onion, red and green peppers, cilantro, and jalapeño pepper in Quick Chef with blade attachment; cover and turn handle to coarsely chop.
Add remaining ingredients; cover and chop until mango and pineapple are desired consistency. Add additional pineapple juice if desired.
Remove blade from Quick Chef and place salsa in a serving bowl using the Saucy Silicone Spatula. Chill until ready to serve. Serve with tortilla chips.