Wonderful recipe with excellent flavor. Here are my slight changes: The recipe did not say to precook the manicotti, but after looking at the box and seeing that they did that for their recipe, I boiled the noodles until just barely cooked - about 6 minutes. I also used a 20 oz. jar of spaghetti sauce and added a thin layer below the manicotti and then put the remainder on top of the pasta as directed in the recipe. When I prepared the filling as directed I had enough leftover to fill an additional four manicotti. Finally, I cooked the dish covered tightly with foil to keep the moisture in and enable the manicotti to be fully cooked. Very Delish!!
I enjoyed this for dinner. I halved the recipe, using vegan ricotta cheese. I used some sauce on the bottom of the dish and added a few extra mushrooms. I had a nice dinner with leftovers for another night. Thanks for a nice way to fix manicotti!