Step 1

In a small bowl or large measuring cup, briskly whisk together the olive oil, balsamic vinegar, honey, salt, and pepper until blended.

Step 2

Place the chicken breasts in a shallow dish or large ziptop bag and pour half of the balsamic mixture over the top. Cover the dish (or seal the bag) and refrigerate for at least 30 minutes or up to 2 hours. Reserve the other half of the (unused) balsamic mixture for serving.

Step 3

Spray an indoor grill pan or a regular nonstick pan with nonstick spray and heat to medium high. Remove the chicken breasts from the marinade, shaking off any excess. Discard the used marinade. Once the grill pan is hot, place the chicken breasts the pan and cook for 3 minutes. Flip, then cook for 3 minutes on the other side. Flip the chicken back to the first side, then reduce the heat to medium. Continue cooking the chicken for an additional 9 to 10 minutes, turning once or twice, until it is cooked through and reaches an internal temperature of 165 degrees F. The actual cooking time may vary depending upon the thickness of your chicken. Remove to a plate, cover with foil to keep warm, and let rest for 5 minutes. Cut into bite-size pieces or longer slices as you prefer.

Step 4

To serve: Place the spinach, blackberries, and onion in a large serving bowl. Drizzle with remaining dressing, then toss to coat. Place the avocado and chicken on top, then sprinkle with the feta, basil, and pecans. Enjoy immediately.