Bring a large pot of salted water to a boil and cook the chickpea pasta according to package directions until al dente.
While pasta cooks, season the chicken breast with sea salt and black pepper on both sides.
Heat avocado oil in a large skillet over medium-high heat and sear the chicken until golden and cooked through, about 5-6 minutes per side.
Remove chicken from the pan to rest, then slice into thin strips.
In the same skillet, add the minced garlic and halved cherry tomatoes, sautéing for 2 minutes until the tomatoes begin to soften.
Stir in the baby spinach until just wilted, then remove the skillet from heat.
In a small bowl, whisk together the basil pesto and Greek yogurt until smooth.
Toss the cooked pasta, sliced chicken, and pesto-yogurt sauce into the skillet with the vegetables, mixing until everything is coated in a velvety glaze.