Wash the peppers, deseed and dice into tiny cubes, set aside till you are ready to use
Cut the ham into small pieces and set aside
Place the pasta in a pan, cover with enough water, add salt and bring to boil till al dente, drain and set aside
Place a pan to medium heat, add vegetable oil and heat for 1 minute. add the diced peppers and stir fry for about 2 minutes, add bouillon (if using), crushed chillies, chopped ham and cook for another 4 minutes till pepper is soft and still crunchy.
To make mac and cheese
Add the milk to a pan and bring to boil on low heat for about 5 minutes, mix the flour with water to form a paste, then add the flour paste to the milk and whisk till its lump free and creamy texture is achieved
Add the cheese to the milk mixture and continue to whisk till its lump free and very creamy and cheesy. Keep an eye at this point as the mixture can thicken up quickly. once you are happy with the consistency of the cheese sauce, reduce the heat or take it off the heat completely before the next step
Add the drained macaroni to the cheese sauce and mix to combine and all pasta covered with the sauce, add the stir fry and mix with the pasta till evenly coated. Serve warm immediately.