Preheat your oven to 400°F and line a baking sheet with parchment paper.
Chop the zucchini and red bell pepper into bite-sized pieces, then toss them on the baking sheet with the olive oil, half the sea salt, and half the black pepper.
Roast the vegetables for 20 minutes or until they are tender and show slight caramelization at the edges.
While vegetables roast, place the dry lentils in a small pot with 1 cup of water, bring to a boil, then simmer for 15 to 20 minutes until tender; drain any excess liquid.
Season the chicken breast with ground cumin and the remaining salt and pepper, then grill or pan-sear until the internal temperature reaches 165°F.
Dice the cooked chicken into small cubes.
In a small mixing bowl, whisk together the Greek yogurt, minced garlic, and lemon juice until the sauce is smooth.
In a large serving bowl, combine the cooked lentils, roasted vegetables, and diced chicken.
Gently fold the yogurt sauce into the lentil mixture until everything is evenly coated.
Garnish with freshly chopped parsley and serve warm.