Portobello Mushroom Sandwich

toasterovenlove.com

Loaded with savory roasted vegetables and melted provolone cheese, this Portobello Mushroom Sandwich is so satisfying even meat-eaters will love it!

Ingredients

Sandwich Rolls Olive Oil Balsamic Vinegar Portobello Mushroom

Adjust the cooking rack to the bottom position, select the BAKE setting, and preheat the toaster oven to 425°F. While the oven preheats, place the sandwich rolls inside to warm and toast.

Rub a rimmed sheet pan with 1 teaspoon of the oil.

In a large bowl, whisk together the remaining 1 teaspoon of olive oil, balsamic vinegar, soy sauce, oregano, garlic powder, and pepper.

Add the mushrooms and stir to coat well with the sauce. Stir in the bell pepper and onion. Pour the vegetables onto the prepared pan.

Once the oven has preheated, remove the sandwich rolls and add the vegetables.

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