You can use 1 tbs No Chicken Bullion to 4 cups water for this broth, or you can use a vegetable broth for a similar experience. If using a vegetable broth taste as you go to ensure there is enough salt and umami. Consider adding a tsp of mushroom seasoning or a tsp of msg to get those savory pops of flavor
A hand held Immersion blender works great for bisques, however it will be tough to get to be ultra smooth like what a standard blender will do. Small bits of the lobster mushroom are tough to completely get smooth- however the texture is still very enjoyable.