Preheat a chargrill pan or grill. Chargrill or grill the courgette, red onion and pepper until soft and tender. You may have to do this in batches.
Warm both sides of the focaccia for a few moments in the chargrill pan or under the grill, then pile the grilled vegetables on top.
Share the Stilton between the focaccia and garnish with a few salad leaves. Season with a little black pepper, then serve.
Cook’s tip: To make mini versions to serve as canapés, split the focaccia through the middle and fill with the grilled vegetables, Stilton and salad leaves. Sandwich together, then slice into bite-size squares and spear with cocktail sticks.
Here are some delicious Stilton recipes