Bring a pot of salted water to a boil for the gnocchi.
In a small dry skillet over medium heat, toast the pine nuts for 2-3 minutes until golden and fragrant, then set aside.
Heat olive oil in a large non-stick skillet over medium-high heat.
Season the diced chicken breast with sea salt and black pepper, then add to the skillet with minced garlic.
Cook the chicken for 5-7 minutes until browned and cooked through.
While chicken cooks, drop the gnocchi into the boiling water and cook until they float to the surface, about 2-3 minutes.
In a small bowl, whisk together the Greek yogurt and basil pesto until smooth.
Reserve 2 tablespoons of gnocchi water, then drain the gnocchi.
Add the gnocchi, baby spinach, and pesto sauce to the skillet with the chicken.
Toss everything together over low heat, adding the reserved water if needed to reach a creamy consistency, then top with toasted pine nuts.