Preheat the grill to high. Brush the halloumi and peaches lightly with olive oil. Place the halloumi on the hot grill and cook for 8 to 10 min. per side or until a crust forms. Grill the peaches for approx. 2 min. per side or just until grill marks show. Place the cheese and peaches in a large bowl and set aside.
In a small bowl, whisk the remaining olive oil with the lemon juice and honey. Pour the mixture over the peaches and halloumi and toss gently to combine. Add thyme leaves and pepper; adjust seasoning, if necessary. Serve warm. Or chill the salad in a resealable container and bring it to room temperature before serving.