Quick carbonara using a Knorr Fix packet, two packs of ham, a 4-cheese blend, and 200ml milk. Add peas if you want — works well.

Cook pasta in well-salted boiling water until al dente.
Meanwhile, fry the ham in a dry or lightly oiled pan until slightly golden. If using peas, add them now and warm through.
Prepare the Fix packet according to instructions using 200ml milk. Stir in the 4-cheese blend while the sauce is hot until melted and smooth.
Combine drained pasta with the ham and pour over the sauce. Toss well and serve immediately.