Bring water and salt (1 tsp) to a boil, in a medium sized pot, over medium-high heat. Cook pasta in this water according to package directions.
While pasta is cooking, add tofu (1/4 package), milk (1/4 c), and garlic salt (1/4 tsp) to blender, and blend until smooth. Set aside.
Once pasta is al dente, drain water. Return pasta to cooking pot, pour tofu, milk mixture over pasta, butter (1 tsp), and sprinkle cheese (2/3 c) over pasta. Stir together until pasta is coated, and cheese is melted. Serve immediately.