Marinate the chicken. Place ¼ cup extra virgin olive oil, 1 tsp dried oregano, ½ tsp garlic powder, ½ tsp kosher salt, and ¼ tsp black pepper in a large mixing bowl, sealable bag, or Tupperware, then mix well. Add chicken breasts, then either toss in the marinade, or seal the container and shake thoroughly. Refrigerate for 30 minutes or up to overnight.
Make the dressing. Combine ¾ cup olive oil, ¼ cup apple cider vinegar, 2 tsp Dijon, 2 tsp honey, minced shallot, 2 Tbsp sliced chives, ½ tsp kosher salt, and ¼ tsp black pepper in a mason jar. Secure with a lid, then shake vigorously. Alternatively, you can place all ingredients in a small bowl, then whisk. Set aside.
Massage the kale. Place thinly sliced kale leaves in a large (and I mean large!) mixing bowl, then drizzle with 2 Tbsp extra virgin olive oil. Use your hands to massage the oil into the kale.
Prepare the vegetables. Place quartered zucchini and squash wedges in a large mixing bowl, then drizzle with 2 Tbsp olive oil, ¾ tsp kosher salt, and ¼ tsp black pepper. Toss to thoroughly coat.
Grill the chicken. Preheat a grill over medium-high heat. When hot, coat the grates with grill spray. Carefully add the chicken breasts, allowing any excess marinade to drip off before placing them on the grill. Cook for 5-7 minutes on the first side, then flip and cook for an additional 5-7 minutes on the second side. The internal temperature of the chicken should register 165°F (74°C).
Grill the vegetables. To the grill, add seasoned zucchini and squash, placing the wedges directly on the grill grates. Cook for 3-4 minutes per side, about 12-14 minutes, until the veggies are tender, charred, and have an almost creamy texture. Transfer to a cutting board. When cool enough to handle, cut into bite-size pieces.
Cut the chicken. The chicken should rest for about 5 minutes before slicing. When ready, cut into small bite-size pieces, about ½-1-inch in size.
Assemble the salad. To the kale, add grilled chicken, grilled veggies, rinsed white beans, diced avocado, ¼ cup toasted pine nuts, 4 oz crumbled feta cheese, and thinly sliced basil leaves. Drizzle the salad dressing on top (as much as you like!), then toss to thoroughly coat. Taste, adjust seasoning, then serve immediately with a sprinkle of flaky sea salt and extra fresh basil. Can also be served at room temperature or straight out of the fridge. Enjoy!