I created this awesome Cashew-Chili Portabello dish for Sunday dinner and it was so delicious. We absolutely loved this flavorful dish!! You can change how spicy you want it by adjusting your dried red chilies. I used 3 and it was medium hot~PERFECT! All mushrooms have high fiber, protein, and are rich in B vitamins. Mushrooms are an excellent source of potassium, riboflavin, niacin, copper and selenium. One medium portabello mushroom has even more potassium than a banana or a glass of orange juice. One serving of mushrooms also provides about 20 to 40 percent of the daily value of copper, a mineral that has cardio-protective properties.