Lentil Falafel Burger Recipe with Creamy Feta Sauce

Make the burgers:
2 In a medium pot, add the lentils, sweet potato and water and bring to a boil over medium-high heat. Reduce the heat to medium-low and gently simmer until the lentils and potatoes are tender, about 25 minutes. Drain the mixture.
3 Transfer the lentil mixture to a food processor. To the lentil mixture, add the onion, egg, panko breadcrumbs through salt and pepper. Pulse until coarsely chopped, about five 1-second pulses.
4 Shape the mixture into four 4- to 4½-inch patties, each about ½ inch thick.
5 Heat a large nonstick skillet over medium heat. Lightly coat the skillet with nonstick pan spray and add two of the lentil burgers. Cook until the burgers are browned, 3 to 4 minutes, then flip and cook on the other side, about 3 minutes more. Transfer to a large plate and repeat with the remaining patties.
Make the sauce:
8 To a medium bowl, add the feta cheese, then use a fork to crumble it. Stir in the yogurt and mint.
9 Place a lentil burger on 4 burger bottoms, top each with some of the feta sauce and your veggies. Top with the remaining burger buns. Serve immediately.