Preheat the oven to 180 degrees.
Prepare your béchamel sauce; once you have added all the milk add the cheddar and parmesan, and add small amounts at a time, to ensure the cheese melts evenly. Add nutmeg and mix through.
Heat a pan and add the oil and West Peak Supreme Russian slices and fry for a few minutes and set aside.
Place the cooked pasta into a prepared oven dish and pour the cheese sauce over the pasta. Top with slices of Russian sausage and a handful of the grated cheddar and parmesan cheese. Garnish with thinly sliced tomato (optional).
Bake for about 30 minutes and when the cheese is slightly tanned. Serve with a fresh, crisp salad.