How can I make shepards pie recipe with portabello mushrooms? Can you share some ideas and tips regarding my issue? Has anyone of you has ever made a shepards pie with portabello mushrooms? I want to try this but I am clueless on how to approach since I am new to cooking, are there any other fillers that can be used to mix in shepards pie recipe with portabello mushrooms? I am not big on corn or soy based products infact some of them make me feel sick. But yes I do eat eggs and cheese a lot and love them. I am planning to serve some meat eaters so please advise me accordingly.