Make the lemon garlic chicken: Add olive oil, garlic powder, dried basil, dried oregano, minced garlic cloves, lemon juice, lemon zest, honey, fresh parsley, salt and pepper in a ziploc bag. Seal it and mix the marinade ingredients. Add chicken breast and coat in the marinade. Let it marinate for at least 30 minutes or up to 6 hours. Heat a grill over medium heat, discard the extra marinade and cook the chicken for 5-7 minutes on each side or until the internal temperature reaches 165°F.
Make the tahini dressing while the chicken cooks: In a medium bowl mix olive oil, tahini, lemon juice, mustard, honey, salt and freshly ground black pepper. Whisk until smooth. Add ice-cold water and whisk again. Taste and add more seasonings or lemon juice if needed. If it's too thick, add 1 tbsp cold water at a time until creamy. Store it in the refrigerator for up to 1 week.
Assemble the winter citrus salad: Toss all salad ingredients, add the sliced lemon garlic chicken and drizzle with tahini dressing. Season with salt and freshly ground black pepper to taste.