Ingredients

• 1 , 16 ounce
• 0.5 small onion , chopped
• 3 tablespoons olive oil , divided
• 1 , 15 ounce
• 1 , 8.8 ounce
• 0.5 cups walnuts
• 1 tablespoon Worcestershire sauce
• 1 tablespoon ketchup
• 2 teaspoons soy sauce
• 1 teaspoon garlic powder
• 1 teaspoon smoked paprika
• 1 teaspoon chili powder
• 0.5 teaspoons kosher salt , or more to taste
• 0.5 teaspoons ground black pepper , or more to taste
• 1 large egg
• 0.75 cups dry bread crumbs
• 8 slices Muenster cheese , Optional
• 8 , 2 ounce

Instructions

1. 1 Preheat the oven to 450 degrees F (230 degrees C). Line a rimmed baking sheet with foil.
2. 2 Place mushrooms and onion on the prepared baking sheet. Drizzle with 1 tablespoon oil and toss to coat.
3. 3 Roast in the preheated oven for 10 minutes. Reduce heat to 425 degrees F (220 degrees C) and add black beans to the pan. Cook until mushrooms and onions are browned and beans are dried on the surface, about 5 more minutes.
4. 4 Remove from the oven and let mixture cool for 10 minutes.
5. 5 Transfer mixture to a food processor. Add rice and walnuts and pulse until roughly chopped. Add Worcestershire sauce, ketchup, soy sauce, garlic powder, paprika, chili powder, 1/2 teaspoon salt, and 1/2 teaspoon pepper and pulse until just combined. Add egg and pulse until just combined.
6. 6 Transfer mixture to a medium bowl and fold in bread crumbs until well mixed. Chill for 10 minutes.
7. 7 Form mixture into 8 patties and season each with salt and pepper.
8. 8 Heat 1 tablespoon oil in a large skillet. Add 4 patties and cook, undisturbed, until browned and a nice crust has formed, about 4 minutes. Flip and cook until done, 4 to 5 more minutes. Top with Muenster cheese and place on toasted buns.
9. 9 Add remaining 1 tablespoon oil to the skillet and repeat to cook remaining patties.

Nutrition per serving