Rhubarb Coffee Cake
["1/2 c. margarine", "1 1/2 c. sugar", "1 egg", "1 c. sour or buttermilk", "1 tsp. vanilla", "1 tsp. soda", "2 1/2 c. flour", "3 c. cut rhubarb", "1/2 c. brown sugar", "1/2 c. nuts"]
["Mix all ingredients except brown sugar and nuts; put in 9 x or 10 x 13-inch pan.", "Sprinkle with brown sugar and nuts. Bake 45 to 50 minutes at 350\u00b0."]
["margarine", "sugar", "egg", "sour", "vanilla", "soda", "flour", "cut rhubarb", "brown sugar", "nuts"]