Preheat grill pan to med/high and preheat oven to 400°F
Start by making the dressing. Add all ingredients to a small bowl and give it a good whisk. Set aside for later use
Tear focaccia bread into small bite-sized pieces and add to a medium-sized mixing bowl. Drizzle olive oil and season with kosher salt. Mix well so that bread bites have an even coating of olive oil.
Place on a baking sheet and toast for 5 minutes or until bread is completely dried out and edges begin to brown. Remove from oven and set aside to cool.
Once grill pan gets hot, spray with avocado oil spray. Add peaches, cut-side down. Grill 2 minutes each side, or until each side begins to caramelize. Place on a plate and set aside.