From Rick Bayless, 'Authentic Mexican.' If you're looking for an authentic Mexican salsa, this is it! It's so simple too! I only use one onion and two jalapenos when I make it, but I decided I'd post the original recipe instead of altering it. The way I make it produces a medium heat. I'd imagine making it his way would produce a hot salsa. I really like it with the lime juice. I haven't made it with the vinegar yet.