I think the best lion mane mushroom is still the one eco life is using in their Bal kit teh or the simple life deep fried lion mane mushroom. Coz on its own it's really bland Coz I've bought the non marinated n marinated version.
There's a vegetarian stall in Brickfields that sells curry lion mane mushroom every Tuesday. But portions are small although tasty, and you got to pay extra, probably even more expensive that your average restaurant.