Quick guide on how to obtain all the items you need to eat in order to unlock the LMB Hongmoon Skill Achievement:
1. Ocean Life Force - Fire/Ice Birds at Plog Sanctum (or Poharan in 24 man)
2. Deep Sea Kelp - Red Thrashscales near Summer Song Cafe
3. Golden Honey - Ravenous Brown Bear also near Summer Song Cafe
4. Fog Mushroom - Raging Grassquatch (Really anywhere in skypetal plains i think, but theres some at Summer Song Cafe too and they walk around a lot)
5. Evil Spirit Root - Highbloom Bulbari also at Summer Song Cafe (seems to be a pattern :X)
6. Hongmoon Pellet - Through Clan Crafting