Double-Mushroom Cheeseburger

    This vegetarian burger doubles down on umami with grilled and sauteed mushrooms (plus cheese!).
    Author:
    Publish date:
    Updated on
    double mushroom cheeseburgers with arugula on cutting board

    Recipe by Rochelle Palermo

    Start to Finish: 30 minutes

    Servings: Makes 4 cheeseburgers

    Ingredients

    • 1 onion, sliced

    • 8 oz. sliced cremini mushrooms

    • 2 cloves garlic, chopped

    • 4 tbsp. olive oil

    • 4 portobello mushrooms, stemmed

    • 1 cup grated Gruyère

    • 4 hamburger buns, toasted

    • 1/2 cup Dijonnaise

    • 2 cups arugula

    Preparation

    In skillet, cook onion, cremini, and garlic in 2 tbsp. oil over medium-high, stirring often, until browned, about 15 minutes; season. Brush portobellos with remaining 2 tbsp. oil. In grill pan, cook portobellos, stemside down, over medium-high for 5 minutes. Turn; top with cremini mixture, then cheese. Cook until tender, about 5 minutes. Spread buns with Dijonnaise. Add arugula and portobellos.