Be sure to properly heat your charcoal grill using your charcoal grills instruction manual, and instructions on Charcoal package as well as lighter fluid. Also, be sure all the lighter fluid has burned off and coals are hot. You do not want you andouille sausage to taste like lighter fluid.
Brush the andouille sausages with a little oil, then place them on a ready grill preheated to medium-high. Use a set of metal tongs to turn the sausages often, allowing them to brown on all sides.
While andouille sausage is cooking prep onions, garlic, and celery, place olive oil in a large metal skillet onto medium heat, then add onions, garlic, and celery, cook till softened about 4-5 minutes.
Add the diced tomatoes with chiles, alfredo sauce, roasted red peppers, chopped parsley, Cajun seasoning, hot sauce, and fresh ground black pepper to own taste, simmer about 10 minutes.
Remove the Andouille sausage or smoked sausage from the grill, let slightly cool before slicing into bite-size rounds, add to simmering sauce, reduce heat to low and cook for about 5 minutes.
Meanwhile, following package directions cook penne pasta till al dente, remove from the heat source, rinse, and drain pasta.
Place pasta in a large pasta bowl or serving bowl, ladle sauce over pasta, toss the pasta and sauce to combine.