Try this Sformato di cardi recipe, or contribute your own.
A properly baked sformato emerges from the oven with a deeply golden, crisp crust contrasting sharply against a dense, unctuous vegetable custard beneath. Cardoons require aggressive trimming before reaching this stage, as their fibrous stalks harbor bitter strings that survive cooking if left unchecked. Soaking the cut pieces in acidulated water immediately halts the enzymatic browning that plagues raw globe artichoke relatives, preserving their clean flavor profile. Parboiling them in salted water with lemon juice softens the cellular walls without dissolving them completely, striking the balance necessary for a purée that retains structural integrity rather than collapsing into watery paste. Whisking the flour and butter for the roux until it reaches a pale amber hue removes the raw cereal taste, ensuring the dairy base thickens cleanly when cold milk hits the hot pan.
Fibrous strands running along the outer edges of cardoon ribs must be stripped away entirely with a paring knife or vegetable peeler. Cooking the vegetable directly in boiling water without this step leaves unchewable threads distributed throughout the finished flan. Puréeing the drained stalks requires restraint; pulsing them coarsely yields a more satisfying mouthfeel than reducing them to a completely smooth baby-food consistency. Combining this vegetable mass with a thick, nutmeg-scented béchamel and whole eggs creates a suspension that sets firmly at 180°C over a fifty-minute bake time. Buttering and breadcrumbing the baking dish generously prevents adherence and builds the exterior crust essential for textural contrast.