Prepare the Vegetable Medley : Begin by prepping all your produce to streamline assembly later. Place the finely ribboned kale in a large serving bowl. Chop the cucumber, bell peppers, squash, and tomatoes, arranging them in separate containers. Finely chop the dill and mint. Zest the entire lime into a small bowl, then juice it into another.
Cook the Quinoa Base : In the medium saucepan, combine the rinsed quinoa, low-sodium vegetable broth, ground cumin, and ¼ teaspoon of the sea salt. Bring the mixture to a boil over medium-high heat. Once boiling, reduce the heat to low, cover securely, and let it cook for 15 to 18 minutes, or until all the liquid is absorbed. Remove from heat and let it stand, covered, for 5 minutes.
Blend the Kefir-Dill Dressing : While the quinoa cooks, create the dressing. In a food processor or blender, combine the Greek yogurt, kefir, fresh dill, mint, minced garlic, lime juice, and the remaining ¼ teaspoon of sea salt. Blend until the mixture is completely smooth and vibrant green.
Marinate the Chicken : Place the chicken cutlets in a large bowl or a sealable bag. Pour about half of the prepared dressing over them, ensuring each piece is well-coated. Allow the chicken to marinate in the refrigerator for at least 2 hours, and up to 4, to absorb the flavors. Reserve the remaining dressing for serving.
Grill the Chicken Cutlets : Heat the cast-iron grill pan over medium-high heat. Once hot, remove the chicken from the marinade, allowing any excess to drip off (discard the used marinade). Place the cutlets on the grill pan and cook for 5-7 minutes per side. The chicken is done when it has distinct grill marks and a thermometer inserted into the thickest part reads 165°F (74°C). Transfer to a clean cutting board and let rest for 10 minutes before slicing.
Toast the Seeds & Finish the Base : While the chicken rests, place the pumpkin seeds in a small, dry skillet over medium heat. Toast for 3-5 minutes, stirring frequently, until they are fragrant and make a slight popping sound. Remove from heat. Uncover the quinoa, add the lime zest, and fluff with a fork.
Assemble Your Power Bowls : Divide the quinoa among seven bowls. Top with a generous portion of the prepared kale, cucumber, peppers, squash, and tomatoes. Add the sliced grilled chicken. Drizzle with the reserved kefir-dill dressing. Finish each bowl with sliced avocado, crumbled feta, and a sprinkle of the toasted pumpkin seeds.