This recipe from Two Peas & Their Pod was just the ticket.
4 large peaches diced, pitted and skinned removed
1/2 of 1 red onion, diced (* I used a sweet onion)
1-2 jalapenos, diced
1/2 bunch cilantro, chopped
Juice of 1 large lime
Salt and pepper, to taste
In a large bowl, add the peaches, onion, jalapeno, cilantro, and fresh lime juice. Stir well. Season with salt and pepper.