To prepare sauce, whisk together all sauce ingredients in a small bowl and set aside.

Cook penne noodles according to package directions. Drain and keep warm.

While pasta is boiling, cook bacon in a large, non-stick skillet or wok over medium heat for about 2 minutes. Remove and discard 1 tablespoon bacon drippings from skillet. Add mushrooms and onions to skillet. Cook and stir until vegetables begin to soften, about 5 minutes. Add spinach leaves and tomatoes. Cook until spinach is wilted. Stir in chicken and cook just until heated through. Add cooked penne noodles and mix well. Add sauce and mix again. Remove skillet from heat. Sprinkle pasta with Parmesan cheese and freshly ground black pepper. Serve immediately.