Marinated to be tasty and juicy, this portobello ‘burger’ will have you completely forgetting about meat. I posted this to Instagram a while back and my inbox went crazy! It’s so simple and this marinade lends so much flavor. Sandwich thins are a great alternative to a burger bun as they give you that bread taste without overloading you on carbs.

You will need:
Portobello mushroom caps–a large one for each sandwich, or two smaller ones
Sliced red onions for caramelizing

Mushroom Marinade:
1 T. Tamari or soy sauce
1 T. minced garlic
1 T. Worcestershire sauce
1 T. balsamic vinegar
Drizzle of olive oil
(Good for 3-4 mushroom caps)

Optional: slices of red onion

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Toss portobello caps & onions in marinade and let sit 30-45 minutes. Cook in a skillet on med-low heat about 6 minutes on each side, or until the portobellos are soft and cooked through. Caramelize the onions in the marinade alongside the mushrooms.

Next, build your sandwich! I used:
Caramelized onions
Whole grain sandwich thins
Mozzarella cheese
Tomato
Spinach

Y’all, this thing was so juicy and flavorful, I had to eat it over the sink. I wish I had thought to add some avocado slices. I think the cool creaminess would have made it even better. Ah, next time.

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Whatcha think? Are you a mushroom person?