
Place pork in a container. Combine all the marinade ingredients in a small bowl and pour on top on of pork. Place lid on container and put in fridge. Marinade for 4 hours up to overnight. Remove from fridge 30 minutes prior to grilling.
Preheat your grill to 400 degrees. Remove pork from marinade. With the extra marinade, add to a sauce pan and bring to a gentle boil over medium heat. Combine ½ tablespoon of cornstarch 1 tablespoon of cold water to make a slurry. Add slurry to the sauce and cook until thickened, 1-2 minutes. Remove from the heat.
Meanwhile, brush the peaches with olive oil. Cook for about 6-8 minutes, flipping halfway through, or until juicy and achieves grill marks. Allow to cool. Dice grilled peaches, red onion, and mini red peppers and add to a bowl. Top with lime juice, olive oil, cilantro, and agave. Mix all together.