Caramelized Onion & Lentil Burgers
Updated Feb 15, 2021, Published May 01, 2016
This post contains affiliate links. Please see our disclosure policy.
I love my burgers in summer, even if they’re currently of the plant-based variety. As soon as the weather warms up, we fire up our grill and start cooking!

Caramelized Onion & Lentil Burgers
Ingredients
- 1 cup dry brown lentils
- 2/3 cup plus ½ cup gluten-free rolled oats, divided use
- 2 cups vegetable broth
- 1 cup water
- 1 tablespoon mild miso
- 1 tablespoon gluten-free tamari or soy sauce
- 1 teaspoon onion powder
- ½ teaspoon mild paprika
- 1 tablespoon dried basil
- 1 tablespoon ground flaxseed
- 2/3 cup blanched almond flour
- 2 tablespoons extra-virgin olive oil
- 1 large onion, chopped
- 4 garlic cloves, minced or finely grated
Instructions
- Place the lentils and 2/3 cup oats in a medium pot with the broth and water. Bring to a boil over high heat then reduce heat to simmer and cover the pot. Cook, stirring frequently, until the liquid is absorbed and the lentils begin to break down a bit, about 40 minutes. If necessary, add up to ½ cup more water to avoid scorching. The mixture should be very thick and sticky. Remove from heat and stir in the miso, tamari, onion powder, paprika, basil, and flaxseed. Set aside.
- Over medium heat in a nonstick frying pan, toast the almond flour, stirring constantly until golden brown. Remove from the pan and set aside. Add the oil, onion, and garlic to the pan and sauté over medium-low heat, stirring frequently, until the onions are deeply golden, 12-15 minutes.
- Add the onions to the lentil mixture and stir in the remaining ½ cup oats. Mix well. Cover and let sit for 15-30 minutes.
- Preheat the oven to 350ºF. Line 2 baking sheets with parchment paper.
- Using a large ice cream scoop or 1/3-cup measuring cup, scoop the mixture onto the baking sheet and flatten into patties about ½-inch thick. Bake for 25 minutes, then gently flip the burgers and bake another 10-15 minutes, until brown and crisp on the edges.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
The views and opinions expressed on this blog are purely the blog owner’s. This blog accepts free manufacturers samples and forms of cash advertising, sponsorship, paid insertions or other forms of compensation. Affiliate links may be included in this post.