Fresh veggies, such as lettuce, tomato, onion(for serving)
Tzatziki Sauce
½English cucumber
¾cupplain Greek yogurt
1tablespoonchopped fresh dill
1tablespoonlemon juice
¼teaspoongarlic powder
¼teaspoonfine sea salt
Black pepper(to taste)
Instructions
Sauté onion, garlic: Heat 1 tablespoon of grapeseed oil in a skillet over medium-high heat. Add onion, cook until golden brown on the edges, about 8 minutes. Add garlic and cook until fragrant, about 1 minute.
Pulse mixture: Empty onion mixture into food processor. Add tahini, parsley, cilantro, cumin, coriander, lemon zest, salt, and pepper. Pulse until a paste. Add chickpeas and pulse until the mixture looks like a chunky batter (leave some bits of chickpea for texture).
Stir and chill: Transfer the mixture to a large bowl. Stir in quinoa flakes until well mixed. Fold in feta. Cover and refrigerate for 15 minutes.
Preheat: Preheat oven to 400°F (200°C)
Tzatziki sauce: Meanwhile, grate cucumber on the large holes of a box grater. Transfer cucumber to a nutmilk bag or cheesecloth, squeeze out as much liquid as you can. Add cucumber, yogurt, dill, lemon juice, garlic, salt, and pepper to a bowl. Stir to mix. Cover and refrigerate until needed.
Shape and bake patties: Line a baking sheet with parchment. Use your hands to shape 4 patties and place on baking sheet. Brush patties (both sides) with remaining 1 tablespoon grapeseed oil. You want the patties to be well oiled, so use a bit more if needed. Bake until golden brown and firm to the touch, about 30 minutes, flipping halfway.
Assemble: Spread tzatziki on toasted buns. Stack with patties, fresh veggies of your choice, and more crumbled feta (if using).
Notes
Chickpeas: Pat the chickpeas thoroughly so you don't introduce excess moisture into the mixture.
Quinoa Flakes: Quinoa flakes can usually be found in the health foods or gluten free aisle of the store. Some stores, like Whole Foods, also sell it in the bulk section.
Storage tips: Cover and refrigerate extra patties; reheat in an oiled skillet. Or, freeze patties and bake (from frozen) on a lightly oiled baking sheet at 300°F (150°C) until heated through.