Encountered on Bon Appetite. There are lots of mushroom taco recipes out there. Many include garbanzo beans and/or walnuts to bulk things up. Another way to get a chewy-er end product is to use mushrooms that have been dried and then "rehydrated". They never completely rehydrate and remain the sort of chewy stuff that has more of a meat texture. This recipe does some of the drying using the oven. Took about 28 minutes in the oven for fresh mushrooms.