Cook pasta according to package directions. Drain; set aside., Meanwhile, in a large skillet, cook bacon over medium heat until crisp, stirring occasionally. Remove with a slotted spoon, drain on paper towels. Discard all but 1 tablespoon of drippings. , In same pan, cook the beef, onion and green pepper over medium heat until meat is no longer pink; drain. Add garlic; cook and stir until fragrant, 2 minutes. Add corn, tomatoes, buttermilk, cream cheese, chili powder, salt, pepper and reserved pasta; stir to combine., Stir with Monterey Jack cheese and cooked bacon. If desired, sprinkle with additional bacon.