Helvella crispa (white saddle)
Disclaimer: Helvella are said to contain a trace amount of Gyromitrin, a toxin which is said to be diminished by heat; these are therefore still listed by many sources as toxic and I always advise folks to do their own thorough research for their comfort level when eating any wild fungi.
One of my absolute favourite, with a nutty and halloumi-crunch like texture akin to morels (which must also be well cooked to be edible). I cook as I do most mushrooms, with some water till evaporated then fried till crisp (20mins+).