Ingredients
- 2 cloves garlic
- 4 large portobello mushrooms (about 3 ounces each and 4 inches wide)
- 2 tablespoons balsamic vinegar
- 1 tablespoon low-sodium tamari or soy sauce
- 1 tablespoon olive oil
- 1/2 teaspoon kosher salt
- 1/4 teaspoon freshly ground black pepper
- 1 small red onion
- 4 ounces roasted red peppers (about 3/4 cup)
- Vegetable oil
- 4 hamburger buns
- 1/2 cup vegan or regular pesto sauce ( homemade or store-bought )
- 1 cup packed baby arugula (about 1 ounce)
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