I was digging through old cookbooks that I picked up at a yard sale, and I found this. I haven't tried it yet, but it sounds like it has a lot of potential... I'm thinking you could add soy parmesan to get something more Alfredo-like.
2 cups uncooked noodles (about 4oz) - use NoYolks 1/2 cup milk - use soy/rice 1/4 cup mayonnaise or Miracle Whip - use fat-free 2 teaspoons margarine 1/4 teaspoon salt 4 to 6 drops Tabasco sauce
Heat 1 quart water and 1 teaspoon salt to boiling in 2-qt saucepan. Add noodles. Boil uncovered, stirring occasionally, just until tender, 7-10 minutes. Drain. Heat remaining ingredients over low heat, stirring constantly, until smooth and hot. Stir in noodles gently until coated.