The portabello mushroom is the more mature brother of the cremini mushroom, and it offers a large cap that can grow to about six inches in diameter. They have a meaty flavor and hearty consistency, making them the perfect burger patty alternative. There’s nothing wrong with burgers (we adore them,) but it’s nice to have a lighter option when you want to fire up the grill every spring and summer evening. The marinade of balsamic, olive oil, salt and pepper gives the mushrooms a slight tang, and the grill-roasted red pepper makes you feel like you’re in the Mediterranean.
That said, one of the best components of this sandwich is the herbed mayonnaise. (For more ways to dress up your mayo, read our post about How to Make Flavored Mayonnaise.) If your herb garden is already bustling, the mayo can be made with fresh herbs. If not, you can infuse the mayo with the dried herbs and let it rest before using – the flavors really develop after about an hour. The spread is good on other sandwiches or makes a great addition to your potato salad recipe. While the sandwich is great on white rolls, we all liked it best with big toasted whole wheat buns. So go ahead and give your grill menu a little variety. You’ll love these Mediterranean inspired burger replacements.