Bring a pot of salted water to a boil and cook the whole wheat penne according to package directions until al dente.
While the pasta cooks, season the chicken breast with half of the sea salt and black pepper.
Heat the olive oil in a medium skillet over medium-high heat and sear the chicken until golden brown and cooked through, about 5-6 minutes per side.
Remove the chicken from the pan and let it rest for 3 minutes before slicing into thin strips.
In the same skillet, reduce the heat to low and add the minced garlic, sautéing for 30 seconds until fragrant.
Whisk together the Greek yogurt, almond milk, and grated parmesan in a small bowl, then pour into the skillet with the garlic.
Gently stir the sauce over low heat until warm, being careful not to let it boil as the yogurt may curdle.
Drain the pasta, reserving 1 tablespoon of pasta water, and add both to the skillet.
Toss the pasta and sliced chicken in the sauce until well coated, adding the remaining salt and pepper.
Garnish with freshly chopped parsley and serve immediately while the sauce is creamy.