Welcome Green Monsters! We're your online guide to making conscious choices that help people, animals and the planet.
Download food monster: the biggest, baddest, yummiest vegan food app!
Buy the #EatForThePlanet book


Food Monster - Recipes

Oil-Free Walnut-Lentil Burgers With Portobello Mushroom Buns [Vegan, Gluten-Free]

If you enjoy recipes like this, we highly recommend downloading the Food Monster App, it's available for both Android and iPhone and has free and paid versions. The app is loaded with thousands of allergy-friendly & vegan recipes/cooking tips, has hundreds of search filters and features like bookmarking, meal plans and more! The app shows you how having diet/health/food preferences can be full of delicious abundance rather than restrictions!

These epic burgers are guaranteed to win you first place at any cookout contest this summer. The hearty walnut patties are made even more substantial by the addition of red lentils and the mixture is flavored with a savory blend of spices and tossed in the oven (or on the grill), cooked to a golden-brown perfection, and then sandwiched between two Portobellos. This burger is definitely at the top of our "things to cook" list this weekend.

Oil-free Walnut-Lentil Burger Portobello Mushroom Buns [Vegan, Gluten-Free]




  • 1 1/2 cups red lentils
  • 1/2 cup walnuts
  • 1 cup oats (gluten-free if needed)
  • 2 tablespoon soy sauce or tamari
  • Salt and pepper, to taste
  • 1 red onion
  • 1 large carrot
  • 1/2 teaspoon turmeric
  • 1/2 teaspoon cayenne pepper
  • 1 teaspoon cumin
  • Portobello mushroom caps


  1. Cook the lentils until they’re soft.
  2. Shred the onion, walnuts, and carrot in a food processor or grate the carrot and chop the onion and walnuts finely.
  3. Fry them in water for 3-5 minutes.
  4. Combine the lentils with all the remaining ingredients.
  5. Make several thick patties with wet hands and fry them on both sides until they’re golden brown. If you want to make them oil-free, bake them for 15 minutes at 400°F.
  6. Serve the patties on buns of your choice together with your favorite burger toppings.

Nutritional Information

Total Calories: 1349 | Total Carbs: 162g | Total Fat: 37g | Total Protein: 68g | Total Sodium: 45mg | Total Sugar: 5g





German food blogger born in ’94, passionate about food, health, nature, spirituality, and traveling. Believes that physical and mental health is the ultimate key to happiness. Loves to always seek the lesson and tries to deliver valuable personal content along with simple, healthy food inspiration on her social media channels.



Want to read more posts like this? Sign up for our newsletter below!​

Browse through recent recipes below:

Aromatic Dill and Tomato Rice [Vegan, Gluten-Free]

Moroccan-Style Hummus [Vegan]

Quick Rise Garlic Breads [Vegan]

Quick Rise Vegan Garlic Breads [Vegan]

Light and Fluffy Banana-Nut Muffins [Vegan, Gluten-Free]

Disclosure: One Green Planet accepts advertising, sponsorship, affiliate links and other forms of compensation, which may or may not influence the advertising content, topics or articles written on this site. Click here for more information.

0 comments on “Oil-Free Walnut-Lentil Burgers With Portobello Mushroom Buns [Vegan, Gluten-Free]”

Click to add comment
9 Months Ago

Also, both the walnuts and the sliced red onion can be soaked in cold water for a couple hours to leach out their bitterness, especially the tannins in the walnuts - the tannins are what make the walnuts hard on the stomach for some people. Just change the water every hour or so, or keep the liquid and use for other cooking, or pour into a compost bin.

9 Months Ago

Foods are not "fried" in water. They are blanched.


Subscribe to our Newsletter

Follow us on

Do Not Show This Again


Submit to OneGreenPlanet

Terms & Conditions ×