I found this great blog: Norwitz Notions which I can tell is going to be an invaluable resource to me! I am so excited.
I found this recipe there:
Mushroom Olive Compote
5-6 lbs crimimi mushrooms
2 pints black olives (use more if your olives have pits or a lot of brine)
1/2 cup sherry or white wine (the latter if you need it to be kosher for Passover)
Olive oil as needed
Salt (not a lot)
2 small bunches fresh sage (1/2 cup of chopped)
Makes enough for a side dish for 15-20 people (or 8-10 if there aren’t other side dishes).
Note: This recipe is for watery mushrooms. If you are lucky enough to get nice dry ones, you can cut the amount of mushrooms you use by a third or more. Or increase the other ingredients.
Wash the mushrooms then slice. You don’t want to cut corners and chop them in a food processor. Add to a pot with enough olive oil to coat and keep them from sticking. Add more oil as needed. The dish takes a fair amount.
When the mushrooms have started to become glossy and lose that raw look (5-10 minutes or so), add some salt. This will draw out the water. White mushrooms (and cheap brown) will bring out a lot of water.
Now comes the tedious part. Keep the mushrooms at medium heat (simmer but don’t boil) and stir often. Don’t cook for longer at lower heat; you will lose a ton of flavor. It will take a couple of hours to get the water off so they look like this.
At this point, you are probably tired, so turn off the heat, cover, and leave until the next day. They’ll be fine. Note: if you start with quality crimimi mushrooms, you will only have to cook them for about an hour, you’ll end up with a much larger amount, and they’ll have more flavor.
With the pan hot, add the sherry or wine (sherry has a nicer flavor, but is hard to find kosher). Stir and let that burn off.
Drain the olives and pour one pint at a time on to a cutting board. Rough chop the olives (each one should be cut into at least 3 pieces–much easier with a large chef’s knife) and add them to the pot. Then cut and add the sage leaves.
Cook on low heat until everything is warm and the flavors meld. Adjust for salt. You can turn off the heat at any point and let the pot sit there. Just before serving, reheat.
This dish keeps well in the fridge and can be reheated several times.