Chop crabmeat into bite size pieces and set aside. Cook broccoli until almost tender and arrange in the bottom of greased 1 qt. oval casserole. Sprinkle grated cheese over top of arranged broccoli.
Melt 1/4 cup of butter and saute the onion. Add flour, curry powder and salt. Gradually stir in milk and cook until thickened. Stir in lemon juice. Add crabmeat. Pour over broccoli and cheese in casserole.
Melt additional 2 Tbsp. of butter and mix with bread crumbs and sprinkle over top.