Preheat oven to 180C.
Cut off the top third off the rolls. Scoop out the soft bread, leaving about 1cm rim. (Don’t dispose the soft bread bits- make breadcrumbs from it!).
Rub pesto inside the bread bowls, then line them with basil leaves and sliced grilled vegetable of your choice. Season with salt & pepper, then put them on a baking tray.
Drain, pat-dry then thinly slice the mozzarella. Cover the bowls with the cheese slices.
Bake for 10-15 minutes until the cheese starts to melt.
Serve the bowls with baby leaf or rocket salad.