Preheat your oven to 400°F and line a baking sheet with parchment paper.
In a food processor, blend the cooked chickpeas, egg whites, garlic, parsley, cilantro, cumin, salt, and pepper until slightly chunky. Avoid over-processing to maintain some texture.
Shape the mixture into small patties (about 3-4) and place them on the baking sheet.
Bake the falafel patties for 20-25 minutes, flipping halfway through, until they are golden and crispy on the edges.
While the falafel bakes, prepare the fresh herb salad by combining diced cucumber, tomato, red onion, and a handful of additional mixed herbs in a bowl.
Mix the salad with the cooked quinoa and sprinkle with crumbled feta cheese.
For the creamy lemon tahini dressing, whisk together tahini, lemon juice, a splash of water (to thin to desired consistency), salt, and pepper.
Plate the baked falafel atop the quinoa salad and drizzle the lemon tahini dressing over the top. Serve immediately.