Portabella mushrooms are large, generally 4 to 6 inches wide. Their stems are thick and topped by a mottled brown cap with dark-brown gills. Portabellas are actually matured cremini mushrooms. They are available year-round.
Choose unbroken portabella mushrooms. Store ina dish covered with a barely damp paper towels in the refrigerator for up to 3 days.
Portabella stems are woody and should be removed. Do not discard, buy use to flavor stocks. Wipe cap with a damp paper towel to remove dirt. Portabella mushrooms are wonderful when grilled. Combine salt, pepper, minced garlic and parsley to taste. Sprinkle over gill side. Top with 3 tabelspoons of olive oil and grill for 2 to 3 minutes. Do not overcook.