This vegetarian burger doubles down on umami with grilled and sauteed mushrooms (plus cheese!).

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Credit: Photography by Christopher Testani

Recipe Summary test

total:
30 mins
Yield:
Makes 4 cheeseburgers
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Ingredients

Ingredient Checklist

Directions

Instructions Checklist
  • 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.

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