Vegetarian, foraged oyster mushroom chowder

It's important to know the right mushroom for every task.

When you go to buy oyster mushrooms in the store, you will find that the caps are very small (less than 2" across) and still feature "in-rolled" edges. Basically the edges of the caps roll down and under, towards the gills. This is considered the best time to eat oysters, as they have not yet released their spores, and the flesh is at it's most firm and meaty.

They basically look like this:

When the caps are still rolled down towards the gills,
oyster mushrooms have their best firmness. 

It's easy to harvest "optimal" mushrooms when you are farm-raising them. But in the wild, you generally don't have the luxury, unless you know a spot you can visit every day. Most often the oysters you find in the wild will have flat caps, occasionally with rippled and/or cracked edges. They will mostly look like this:

Older oyster mushrooms are less firm, and work best in soups,
gravies, and after being dried and reconstituted.

Older oyster mushrooms, like the ones above, loose some of that firmness, and are less meaty. Some foragers will even bypass these "spongy" specimens, but they still have a lot of flavor, and are perfect in the right application. By pureeing these mushrooms, like in soups or gravies, you avoid the texture issues.

You can also dehydrate older oyster mushrooms. Once reconstituted, they will have a unique texture--not firm and "mushroomy" like the young ones, but more meaty, almost rubbery a bit. Rather like cooked clams, which is what made me want to try this dish.

Being a native New Englander living in Texas, I sometimes find myself overwhelmed with the desire for foods I simply can't get around here. Sometimes it's lobster rolls, but most often it's clam chowder.  I'd heard that oyster mushrooms can make a passible substitute for clam chowder, and I was highly skeptical, but I decided to give it a shot.