Grilled Lion's Mane with Coconut, Coriander, and Tarragon (v, gf)

My desire for a dish with tarragon was piqued by a visit to Lion Dance Cafe in Oakland — a vegan restaurant that I heard about through Superiority Burger’s Instagram a long time ago. Like SB, the dishes are vegetable-focused and have surprising, inventive flavors (the owners are Singaporean and Italian), but the whole vibe of the place is casual and fun…