Cook lobster according to package directions; remove meat from shells and cut into chunks. If necessary, remove any shell or cartilage from crab meat; cut up large pieces. Set seafood aside.
Meanwhile, in a skillet melt butter; add celery, onion and green pepper and sauté until tender. Combine water, milk, cornstarch and soy and Tabasco sauces; stir into skillet. Cook over low heat, stirring constantly, until thickened (about 5 minutes). Stir in sour cream.
Remove from heat. Add lobster and crab meat. Turn into buttered 1 1/2 qt. casserole dish; sprinkle noodles and nuts over top.
Bake in a preheated 350°F oven for 30-40 minutes.
Makes 4-6 servings.
Submitted by: CM