Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Toss the cherry tomatoes with half of the olive oil and a pinch of sea salt, then roast for 12-15 minutes until the skins begin to burst.
Season the chicken breast with the remaining sea salt and black pepper.
Heat the remaining olive oil in a large skillet over medium-high heat and sear the chicken until golden and cooked through, about 5-6 minutes per side, then set aside to rest before slicing.
Bring a pot of salted water to a boil and cook the potato gnocchi until they float to the surface, then drain immediately.
In the same skillet used for the chicken, add the minced garlic and sauté for 30 seconds until fragrant.
Lower the heat to low and whisk in the basil pesto and plain Greek yogurt until a smooth, creamy sauce forms.
Add the cooked gnocchi, sliced chicken, and baby spinach to the skillet, tossing gently until the spinach is just wilted.
Serve the gnocchi in a shallow bowl topped with the warm roasted cherry tomatoes.