"This is our take on fregola con arselle, a classic Sardinian dish," says Ward. "Fregola was brought to Sardinia by Ligurian immigrants from a colony in Tunisia, and hence shares many similarities with the couscous of North Africa. When it's cooked like a risotto rather than steamed, the starch is released into the sauce, creating a creamy texture that's perfect with shellfish. Late-summer cherry tomatoes add a lovely sweet-acidic balance to round out the dish."
Note Order prawn heads ahead from your fishmonger; crab shells also work. You can also substitute the pipis with clams or vongole.