Fiddlehead ferns are technically a vegetable, though they are foraged. They must be harvested before the fern plant unfurls completely. Each plant is high in omega-3 and omega-6 fatty acids as well as iron and fiber. They are eaten as a leaf vegetable.

Fiddleheads are in the Inception stage — they are a unique ingredient mostly found at fine-dining restaurants and those in the Northeast.

Green Street Grill — Bensenville, Ill.

• Pan Roasted Salmon — pea risotto, sauteed fiddleheads, sorrel yogurt.