Cook the pasta. Bring a large pot of salted water to a boil. Cook pasta according to package instructions until al dente. Reserve about ½ cup of pasta water, then drain.
Cook the chicken. Preheat the oven to 400 degrees Fahrenheit. Place the chicken in a medium bowl, add olive oil and season with chicken seasoning on both sides. Mix to coat. Place the seasoned chicken on a parchment paper lined baking sheet and bake for 25 minutes.
Make the sauce while the chicken is baking. In a blender, combine cottage cheese, milk, parmesan cheese, cornstarch, salt, black pepper, and nutritional yeast (if using).Blend until completely smooth.
Heat 1 teaspoon olive oil in a large skillet. Add minced garlic and cook, stirring for about 2 minutes. Cook, stirring frequently, until warmed through and slightly thickened, about 3–5 minutes. Do not let it boil.
Add the cooked pasta to the sauce and toss to coat. Add a splash of reserved pasta water as needed to loosen the sauce.
Top pasta with sliced cooked chicken and garnish with fresh parsley. Serve immediately.