In separate pans cook vegetables and pasta according to package directions; drain. Cut up any large vegetable pieces. In a saucepan melt butter. Stir in flour, peel, 1/2 teaspoon salt and a dash of pepper. Stir in milk. Cook and stir till thickened and bubbly. Stir in sour cream and begetables. Heat almost to boiling. Spoon half the sauce into a 12x7x2" baking dish. Toss together cooked pasta, egg, and Parmesan. Using a long-tined fork, twirl a few strands of fettucine around tines. Remove pasta from fork, standing pasta upright in baking dish to form a nest. Continue forming nests in baking dish to make 6 portions with 3 nests each. Spoon remaining vegetable sauce over pasta. Cover and bake at 350 degrees about 20 minutes or till heated through.