1. Preheat a grill or grill pan over medium-high heat . Lightly brush the peach halves with olive oil to prevent sticking . Grill the peaches cut-side down for 2-3 minutes until grill marks appear and the peaches soften slightly . Remove from the heat and let cool .
2. Dice the grilled peaches into small pieces . In a blender or food processor, combine the grilled peaches, honey, Dijon mustard, balsamic vinegar, olive oil, soy sauce, and minced garlic . Blend until smooth and creamy . If the dressing is too thick, add a tablespoon of water or more olive oil to adjust the consistency .
3. Taste the dressing and season with salt and pepper as needed . Transfer to a jar or airtight container and refrigerate until ready to use .
Enjoy this sweet, tangy dressing on salads, grilled veggies, or as a marinade!