To prepare the mint relish: in a small bowl, mix all the ingredients together, cover and set aside.
Place the chops on a chopping board. Season and sprinkle the lemon zest all over. Brush with the oil.
Cook on a prepared BBQ or under a preheated moderate grill for 6–8 minutes.
Sprinkle half the peppers onto a large plate, add the chops, sprinkle over the feta, the remaining peppers and some of the mint relish.
Serve immediately with a crisp green salad and any remaining relish.