Low-Carb Portobello Mushroom Fajitas

Staff Writer
Low-Carb Portobello Mushroom Fajitas
Lisa Books-Williams

Mushroom Fajita

For a vegan approach to the Mexican staple, try this recipe that substitutes the tortilla with lettuce.

Deliver Ingredients


To read more about Lisa Books-Williams and her holistic teachings, visit her website


For the fajita

  • 2 large portabello mushroom caps, de-gilled and cut into strips
  • 1 bell pepper, seeded and cut into thin strips
  • 1 medium onion, sliced
  • 1/2 bunch cilantro, stems removed and chopped
  • 1 medium-sized tomato
  • 1/8 Cup water
  • 1/4 Cup olive oil
  • 2 Tablespoons lime juice
  • 2 cloves garlic
  • 1 jalapeño, seeded
  • 1 Tablespoon cumin
  • 2 Tablespoons chili powder
  • 1 Tablespoon paprika
  • 1 Teaspoon Himalayan salt
  • 1/4 Teaspoon cayenne

For the Not-So Cheese sauce

  • 1 Cup raw cashew, soaked in water for 4 hours and drained
  • 1/4 Cup macadamia nuts
  • 1 red bell pepper, seeded and chopped
  • 1 jalapeños, seeded and chopped
  • 2 cloves garlic
  • 1/2 Teaspoon Himalayan salt
  • Juice from 1 lemon
  • 1 Teaspoon paprika
  • 1 Tablespoon chili powder
  • Water, as needed for desired consistency


For the fajita

Place the mushrooms, bell pepper, onion, and cilantro into a gallon-sized Ziploc bag. Place the rest of the ingredients in a blend and purée until smooth and add to the bag. Squeeze any air from  the bag, seal, and give it a gentle shake. The marinade will naturally cook and soften the vegetables. Allow to set for 30 minutes to 1 hour. 

Use 1 romaine lettuce leaf to build the fajita, and top with the not-so cheese sauce. 

For the Not-So Cheese sauce

Combine all of the ingredients in a blender and purée until smooth. Store in the refrigerator for up to 5 days. Can also be enjoyed with jicama, chips, and vegetables.

Portobello Mushroom Shopping Tip

Buy mushrooms that are intact, firm, and fleshy. Avoid mushrooms that are slimy or have split caps.

Portobello Mushroom Cooking Tip

To clean mushrooms, briefly run cold water over them or gently wipe with a damp towel.