The largest cultivated mushroom, portabellas are a hearty, savory, meaty variety with loads of umami, making them an ideal choice for both meat and meatless dishes. The original veggie burger, a grilled or sauteed portabella cap can satisfy the heartiest of appetites. They steal the show in dishes that show off their large size, rich flavor and steak-like texture, and are an ideal choice as a whole-ingredient meatless alternative.