Zucchini Casserole Imperial
["4 c. sliced zucchini", "2 c. boiling water", "2 eggs", "1 c. mayonnaise", "1 medium onion, chopped", "1/2 c. chopped green pepper", "1/4 c. chopped celery (optional)", "1 c. grated Parmesan cheese", "salt and pepper to taste", "1 Tbsp. butter or margarine", "2 Tbsp. buttered breadcrumbs (optional)"]
["Cook zucchini until tender (not mushy); drain.", "In large bowl, beat eggs; stir in mayonnaise, onion, green pepper, celery, salt and pepper.", "Add zucchini.", "Turn into a greased 1 1/2-quart baking dish.", "Dot with butter and sprinkle with buttered breadcrumbs."]
["zucchini", "boiling water", "eggs", "mayonnaise", "onion", "green pepper", "celery", "Parmesan cheese", "salt", "butter", "buttered breadcrumbs"]