Heat an outdoor grill or grill pan to medium heat. Grease lightly with cooking oil. Brush peaches with olive oil and place on grill cut side down. Grill for 4-5 minutes. Remove from grill and cool for 5 minutes.
Chop peaches and add to a medium mixing bowl. Add tomatoes, onion, jalapeño, cilantro, tea crystals, cumin and salt. Stir well to combine. Serve salsa with tortilla chips for dipping.