Preheat the oven to 200C/400F/gas mark 6. Take a small, ovenproof dish and line it with kitchen foil, so that it will enclose and cover the feta.
Put the feta in the centre of the foil. Cover with olive oil and scatter with thyme leaves. Fold the foil over to seal the parcel. Bake for about 8 minutes; the cheese will start to soften.
Preheat the grill. Pull the foil back from the cheese and drizzle with honey. Grill for 2 minutes, or until the honey has browned. Season with black pepper, then serve immediately with the flatbread. It goes particularly well with a cucumber, tomato and olive salad.