A crisp walnut topping gives these grilled fresh sardines a lovely texture. They can be served as a main course or appetizer with warm olive oil, lemon wedges, rocket leaves and plenty of fresh bread.
To make the walnut and parsley topping, melt the butter in a pan over moderate heat, add the shallots and garlic, cover and cook for about 3 minutes, or until soft and translucent. Remove from the stove, season with some salt and black pepper, then add the breadcrumbs, walnuts and parsley and mix thoroughly.
Preheat the grill to high. Wash the sardines, then dr