Season the chicken breast evenly on both sides with the sea salt and black pepper.
Heat the olive oil in a medium skillet over medium-high heat. Add the chicken and cook for 6-7 minutes per side until golden brown and cooked through.
Remove the chicken from the pan, let it rest for 5 minutes, then slice it into thin strips.
In a small bowl, whisk together the Greek yogurt, lemon juice, garlic powder, onion powder, and dried dill to create the clean ranch dressing.
Slice the avocado and tomato into thin wedges.
Warm the tortilla slightly in a dry pan or microwave for 10 seconds to make it pliable.
Layer the baby spinach in the center of the tortilla, followed by the sliced chicken, avocado, and tomato.
Drizzle the Greek yogurt ranch over the fillings, fold in the sides, and roll the tortilla tightly into a wrap.