How do I keep this recipe gluten-free?

Use certified gluten-free packaged ingredients and avoid shared utensils, boards, pans, or toppings that touched gluten-containing foods.

Can I adjust the main ingredients?

Yes. Swap ingredients with similar moisture, protein, or cooking behavior to keep timing and texture close to the original.

How do I serve it with mixed-diet family?

Serve the gluten-free recipe first and keep any gluten-containing toppings and sides separate.

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Lunch

Gluten-Free High-Protein Lentil and Walnut Veggie Burgers

Name: Gluten-Free High-Protein Lentil and Walnut Veggie Burgers
Prep time: 20 min
Cook time: 15 min
Total time: 35 min
Yield: 6 servings
Cuisine: American-inspired
Ingredients: 1 cup dried brown or green lentils, rinsed; 2 1/2 cups water or vegetable broth; 1 cup finely chopped yellow onion; 2 cloves garlic, minced; 1 cup finely grated carrot; 1/2 cup finely chopped celery; 1/2 cup finely chopped walnuts; 1/4 cup ground flaxseeds; 3 tablespoons gluten-free oat flour or almond flour; 2 tablespoons gluten-free tamari or soy sauce; 1 teaspoon smoked paprika; 1 teaspoon ground cumin; 1/2 teaspoon black pepper; 1/2 teaspoon salt, or to taste; 2 tablespoons olive oil or avocado oil (for cooking); gluten-free burger buns or lettuce wraps, tomato slices, avocado, mustard, or your favorite condiments

By Freeflourish Test KitchenReviewed by Freeflourish Editorial TeamPublished May 9, 2026 · Updated Jul 7, 2026

American-inspired 35 mins glutenfreehighproteinvegetarianfamilyfriendlymaincourseeasymealprepquickrecipeshealthy

These gluten-free lentil and walnut veggie burgers are a protein-rich vegetarian main course, ideal for lunch, easy dinners, and meal prep. Family-friendly and flavorful.

Gluten-Free High-Protein Lentil and Walnut Veggie Burgers

Prep 20 min

Cook 15 min

Total 35 min

Servings 6

Difficulty easy

Cuisine American-inspired

Ingredients

Servings 6

1 cup dried brown or green lentils, rinsed
2 1/2 cups water or vegetable broth
1 cup finely chopped yellow onion
2 cloves garlic, minced
1 cup finely grated carrot
1/2 cup finely chopped celery
1/2 cup finely chopped walnuts
1/4 cup ground flaxseeds
3 tablespoons gluten-free oat flour or almond flour
2 tablespoons gluten-free tamari or soy sauce
1 teaspoon smoked paprika
1 teaspoon ground cumin
1/2 teaspoon black pepper
1/2 teaspoon salt, or to taste
2 tablespoons olive oil or avocado oil (for cooking)
gluten-free burger buns or lettuce wraps, tomato slices, avocado, mustard, or your favorite condiments

FreeFlourish Gluten-Free High-Protein Lentil and Walnut Veggie Burgers ingredients

Instructions

Place lentils and water or vegetable broth in a medium saucepan and bring to a boil. Reduce heat to low, cover, and simmer for 20-25 minutes until lentils are tender but not mushy. Drain excess liquid and let cool slightly.
While lentils cook, heat 1 tablespoon olive oil in a skillet over medium heat. Sauté onion, garlic, carrot, and celery for 5-7 minutes until soft and fragrant. Set aside to cool.
In a large bowl, lightly mash cooked lentils with a fork, leaving some texture.
Add sautéed vegetables, walnuts, ground flaxseeds, oat or almond flour, tamari, smoked paprika, cumin, pepper, and salt. Mix until combined and the mixture binds well. Add more flour if too wet.
Cover and refrigerate for at least 30 minutes to firm up for shaping.
Divide mixture into 6 equal portions and form into 3/4-inch thick patties.
Heat remaining 1 tablespoon oil in a non-stick skillet over medium heat. Cook patties 4-5 minutes per side until golden brown and heated through, flipping carefully.
Serve warm on gluten-free buns or lettuce wraps with your preferred toppings and condiments.
Store leftovers in airtight container in refrigerator up to 4 days or freeze patties individually for up to 3 months.

FreeFlourish Gluten-Free High-Protein Lentil and Walnut Veggie Burgers finished dish

Tips

Allergen Overlap Note

Check every packaged ingredient for certified gluten-free status, especially spices, broths, sauces, seed products, and baking staples. Use clean prep surfaces and dedicated utensils when preparing Gluten-Free High-Protein Lentil and Walnut Veggie Burgers for someone with celiac disease.

Texture Expectations

Gluten-Free High-Protein Lentil and Walnut Veggie Burgers should keep the intended servings texture when cooked and plated carefully.

Dining With Non-GF Family Note

Prepare and serve on a dedicated gluten-free surface first, then keep any shared side dishes separate with dedicated serving utensils.

Frequently Asked Questions

Can I make Gluten-Free High-Protein Lentil and Walnut Veggie Burgers ahead?: Yes. Prepare components early, then store and reheat according to the storage guidance so the texture stays close to fresh.
How do I keep this recipe gluten-free?: Use certified gluten-free packaged ingredients and avoid shared utensils, boards, pans, or toppings that touched gluten-containing foods.
Can I adjust the main ingredients?: Yes. Swap ingredients with similar moisture, protein, or cooking behavior to keep timing and texture close to the original.
How do I serve it with mixed-diet family?: Serve the gluten-free recipe first and keep any gluten-containing toppings and sides separate.

Ingredient Replacements

gluten-free burger buns or lettuce wraps: Use a certified gluten-free equivalent and choose a similar ingredient with matching moisture, texture, or cooking time. Check labels for shared-facility warnings when cooking for celiac disease or multiple allergies.
main vegetable: Use a certified gluten-free equivalent and choose a similar ingredient with matching moisture, texture, or cooking time. Check labels for shared-facility warnings when cooking for celiac disease or multiple allergies.
protein: Use a certified gluten-free equivalent and choose a similar ingredient with matching moisture, texture, or cooking time. Check labels for shared-facility warnings when cooking for celiac disease or multiple allergies.
seasoning: Use a certified gluten-free equivalent and choose a similar ingredient with matching moisture, texture, or cooking time. Check labels for shared-facility warnings when cooking for celiac disease or multiple allergies.
cooking fat: Use a certified gluten-free equivalent and choose a similar ingredient with matching moisture, texture, or cooking time. Check labels for shared-facility warnings when cooking for celiac disease or multiple allergies.

Storage and Reheating

Cool completely before covering. Refrigerate leftovers for up to 4 days, or freeze for later use. Reheat slowly to keep texture closer to fresh.

Read related air fryer guides and cooking tips.

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Gluten-Free High-Protein Lentil and Walnut Veggie Burgers

Recipe Details

Ingredients

Instructions