I didn't have portabellas, so I used 16 oz of button mushrooms. I made a double recipe. I think next time, I'll make a double recipe of the veggies, but single of the beans and barley. This is very filling. Served with bread and salad, the double recipe made enough for 4 meals for our family of 4. I'm freezing the rest and we'll see how it does. Oh, and we added salt - definately needs salt. Our 2-year-old wasn't wild about it but the rest of us liked it, but did not love it. It was a lot of chopping - an hour of prep with a two and five year old "helping". It was very beige in color - except for the carrots.