Rip Esselstyn's Portobello Mushroom Burger with Sweet Potato Fries

Created for the Engine 2 Diet, this recipe will help you pass Drill 2 with flying colors. You don't have to live without burgers and fries; just follow this healthy recipe. To purchase your copy of The Engine 2 Diet, click here.

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  • 4 Portobello mushrooms
  • Low-sodium tamari
  • Vegetarian Worcestershire sauce
  • Splash of beer
  • Cracked pepper
  • 1 large red onion
  • 4 whole grain buns
  • Dijon mustard
  • tomato
  • lettuce
  • spinach
  • 2 sweet potatoes


Preheat oven to 450 degrees F. Snap the stems off the mushrooms. Place the mushrooms face-up on a baking sheet. Splash a few drops of tamari (variation:use BBQ Sauce instead!) and Worcestershire (beer splash is optional) into each cap. Season with pepper. Place the stems into the caps. Cook in a casserole dish for 10-15 minutes, until the mushrooms are soft and filled with liquid. Enjoy the stems as starters! Cook the onion rounds on high heat in sprayed skillet for 5 minutes, stirring often, until wilted and brown. Spread the buns with Dijon mustard. Place each mushroom on a toasted bun with cooked onion, tomato, lettuce or spinach, and your favorite fixings. Preheat the oven to 450 degrees F. Place the potato slices on a sprayed baking sheet and cover with aluminum foil. Cook for 30-40 minutes, turning once. Remove the foil after 20 minutes to allow the slices to brown.