Rhubarb Surprise

Fresh rhubarb, diced
1/2 cup granulated sugar
1 box strawberry cake mix
1 cup chopped walnuts
1 cup (2 sticks) margarine, melted

Fill a 13 x 9-inch baking dish half full of chopped rhubarb. Sprinkle with sugar. Spread dry cake mix over the top. Sprinkle with walnuts. Drizzle margarine over all. Bake at 350 degrees F for 45 minutes to 1 hour.