Place a small dry skillet over medium-low heat and add the pine nuts, tossing frequently for 2-3 minutes until golden brown and fragrant, then set aside.
Season the chicken breast with sea salt and black pepper.
Heat the avocado oil in a large non-stick skillet over medium-high heat. Add the chicken breast and cook for 5-6 minutes per side until the internal temperature reaches 165°F, then remove from the pan and dice into bite-sized pieces.
In the same skillet, add the cauliflower gnocchi in a single layer. Sear for 3-4 minutes per side until the edges are golden and crispy.
Reduce the heat to low and return the diced chicken to the skillet along with the baby spinach, stirring until the spinach just begins to wilt.
In a small bowl, whisk together the basil pesto, Greek yogurt, and lemon juice until smooth.
Remove the skillet from the heat and fold in the creamy pesto mixture until the gnocchi and chicken are evenly coated.
Plate the gnocchi immediately and garnish with the toasted pine nuts.