Cook your pasta according to instructions.
While you’re waiting for the pasta, cook the optional sausage and set aside. Add a tablespoon of butter to the pan and saute the onions until soft. Add the garlic and cook another minute.
Pour that into a blender with the roasted red peppers and tomatoes. Blend till smooth.
Add the rest back to the pot on low heat and stir in the half n half
Add salt, red pepper flakes (omit if cooking for a baby as well and serve on individual plates), pepper, and a lot of freshly grated parm!
Once the pasta is done, add it straight into the sauce and stir it all up well. Serve with the sausage, basil, and more parm and pepper flakes.