I believe you can find these all over the northern US, but they are popular in New England no doubt. Fiddleheads... they are the unfurled shoots of the ostrich fern which you can forage for yourself or buy at the stowah. Taste like asparagus but a tiny bit bitter. Taste like spring. Wash, sauté with butter and garlic, squeeze of lemon then salt and pepper. Very short window on these, out now.
