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Lentil Quinoa Veggie Burgers with Avocado Sauce

Lentil quinoa veggie burgers are their own tasty world, a mouthwatering meatless celebration of glorious summer days. Or a wintery evening when all you want is comfort food!

Lentil Quinoa Veggie Burgers with Avocado Sauce | Letty's Kitchen

These “burgers” have it all when it comes to plants. You know, food that comes from plants, like vitamin-rich red onions, carrots, parsley, and sun-dried tomatoes. There’s plenty of healthy protein too, plant protein that is, with red quinoa, tender brown lentils, and walnuts.

Chili powder and smoked paprika bring on gentle spice. To help bind everything together, making them easier to shape into patties, we stir in an egg (or flax “egg”), plus a touch of oat flour  You can either use a farm egg, or keep these burgers strictly plant-based by using a “flax egg.”

ingredients for Lentil Quinoa Veggie Burgers with Avocado Sauce | Letty's Kitchen

Michael Pollan, the award-winning author of The Omnivore’s Dilemma, wrote, “If it came from a plant, eat it. If it was made in a plant, don’t.” So let’s bite into plants, plants masquerading as hamburgers, life-giving lentil quinoa veggie burgers.

Sauce these awesomely delicious plant burgers with a simple blend of avocados, lemon juice and garlic salt. A lot of times Robbie and I will scarf down veggie burgers without the bun, and top them with nothing more than this quick avocado sauce.

Lentil Quinoa Veggie Burgers with Avocado Sauce | Letty's Kitchen

Except lately. I’ve been baking whole wheat burger buns for more homemade goodness. Lentil quinoa veggie burgers with avocado sauce, sandwiched between homemade whole wheat buns—hook in and hold on!

Lentil Quinoa Veggie Burgers recipe notes:

  • You can’t just plop these babies on the grill grates like you would a meat pattie—veggie burgers are fragile. You cook them in a skillet. Once they’re golden brown on both sides, you can keep them hot on a grill pan, like this one. (Grill pans with small holes or slits in the metal are perfect for grilling anything small enough to fall through grill grates.)

Lentil Quinoa Veggie Burgers shaped and ready to cook | Letty's Kitchen

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4.6 from 5 votes
Lentil Quinoa Veggie Burgers with Avocado Sauce | Letty's Kitchen
Lentil Quinoa Veggie Burgers
Prep Time
35 mins
Cook Time
30 mins
Total Time
1 hr 5 mins

These awesomely delicious plant-based good-for-you veggie burgers are easy to make and both meat eaters and vegetarians love every bite! Makes 6 veggie burgers.

Course: Main Course
Cuisine: Vegan Friendly, Vegetarian
Keyword: veggie burgers, lentils, quinoa, homemade, recipe
Servings: 6 veggie burgers.
Author: Letty Flatt | Letty's Kitchen
Veggie Burgers:
  • 1 egg , or flax egg equivalent (see note)
  • 1 tablespoon olive oil , plus some for cooking the burgers
  • ½ cup finely chopped red onions
  • 1 garlic clove , minced
  • ½ cup grated carrots
  • 1/3 cup chopped walnuts
  • 2 tablespoons sun-dried tomatoes in oil , drained and chopped
  • 1/3 cup chopped parsley
  • 3/4 teaspoon fine sea salt
  • 2 teaspoons chili powder
  • ½ teaspoon smoked paprika
  • 1 ¾ cup cooked brown lentils
  • ¾ cup cooked red quinoa
  • ¼ cup oat flour (see note)
  • Freshly ground black pepper
Avocado Sauce:
  • ¼ cup water
  • 1 tablespoon lemon juice
  • ½ avocado
  • ½ teaspoon garlic salt
  • Pinch of cayenne pepper
Veggie Burgers:
  1. If using a flax egg substitute, mix the flax and water and set aside. (see note)
  2. Heat the oil in a skillet over medium flame. Add the onions, garlic, and carrots, and sauté until the onions are soft. 

  3. Transfer to a food processor bowl. Pulse the cooked vegetables with the sun-dried tomatoes, walnuts and parsley until finely chopped. Add the salt, chili powder, paprika, and about half of the lentils. Pulse to combine. Transfer to a bowl.

  4. Stir in the remaining lentils, quinoa, and the egg or flax egg. (see note) Stir in oat flour. Taste and adjust seasoning.
Avocado Sauce:
  1. Blend the water, lemon juice, avocado, garlic salt and cayenne in the blender, scraping down the sides as needed. It's OK if the sauce is not totally smooth. Scrape into a small serving bowl.
Shape and cook the Veggie Burgers:
  1. Measure about 1/3 cup of lentil and quinoa mix per veggie burger, packing the measuring cup well. Place on an oiled baking sheet or silicone baking mat and shape into patties, about 3 inches wide and 1/2-inch thick. Sprinkle the tops with salt and pepper.
  2. Heat a skillet, preferably non-stick, on medium-high flame. Brush pan with oil or spray with cooking spray. Cook veggie burgers until golden brown, about 15 minutes on each side, sprinkling salt and pepper on the second side after flipping.
  3. Serve with avocado sauce, and your favorite burger fixings.
Recipe Notes
  • Flax eggs work great as vegan substitutes for chicken eggs. For one flax egg, mix 1 tablespoon ground flax seeds and 2 tablespoons warm water in a small cup or bowl. Set aside until the flax absorbs the water and becomes mucus-like.
  • Purchase oat flour, or make your own—by whirling rolled oats in the food processor.


  • Those look terrific! Reply · 16 June, 2016

    • Thanks Tammy! The homemade buns that go with are coming up next! Reply · 16 June, 2016

  • Lyn

    Hi Letty,
    I am trying these burgers this week. What is the best way to cook lentils? Can I cook them in my electric pressure cooker? Reply · 14 July, 2016

    • Hi Lyn, Green lentils cook in 25 minutes without a pressure cooker. And 10-12 minutes in pressure cooker, quick release.
      Can’t wait to hear how you like them! Reply · 15 July, 2016

  • Veronica

    Hi, can I substitute the oat flour with nutritional yeast. Reply · 17 February, 2018

    • HI Veronica,
      I don’t recommend substituting the oat flour with nutritional yeast because the oats are there to help bind all the other ingredients together. Adding some nutritional yeast to these veggie burgers is a wonderful idea. Love the flavor of nutritional yeast! Reply · 17 February, 2018

  • Sherry

    I made these burgers today. We are plant based, gluten and oil free so I made them with flax egg and without oil and we ate them with lettuce buns. They were quite delicious. Thanks so much for sharing the recipe! Reply · 7 July, 2018

    • Thank you Sherry. Way to go with the changes to work with your diet! I am stoked to know you liked them! Reply · 7 July, 2018

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