Can you help me create a simple mushroom stew?

Add some parnips, red onion and even some barely, any vegis YOU like will do. Bigger cut on mushrooms, crimini's or potabellas added at the end as not to turn it black.Veg stock is also good instead of chicken base for vegetarians. Use a roux or slurry to thicken at the end for serving. Served over orzo would be cool.