Bring a large pot of lightly salted water to a boil. Add fettuccine & cook for 8-10 minutes & drain. 2. In a large saucepan, melt butter into cream over low heat. Add salt, pepper & garlic salt. Stir in cheese over medium heat until melted; this will thicken the sauce. 3. Add pasta to sauce. Use enough of the pasta so that all of the sauce is used & the pasta is thoroughly coated. Serve immediately.