Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper and lightly spray with olive oil.
In a large bowl, combine the cooked lentils, egg whites, rolled oats, whey protein isolate, salt, pepper, and a pinch of cumin. Mash lightly with a fork or pulse a few times in a food processor until the mixture is combined but still has some texture.
Form the mixture into 3-4 patties, pressing firmly so they hold together.
Place the patties on the prepared baking sheet. Bake for about 15-18 minutes until the patties are set and the edges start to become crispy.
While the patties are baking, prepare the roasted broccoli: Toss the broccoli florets with a light spray of olive oil, salt, and pepper. Spread them on another baking sheet.
Roast the broccoli in the oven for about 12-15 minutes until tender and slightly charred.
For the Greek yogurt sauce, simply spoon the nonfat Greek yogurt into a small bowl and season with a pinch of salt, pepper, and a dash of cumin. Stir well.
Plate the crispy lentil patties alongside the roasted broccoli and drizzle the chilled Greek yogurt sauce over or serve on the side.
Enjoy your balanced, protein-packed dinner!