Streusel Rhubarb Bread

1 and 1/2 cups packed brown sugar
1/2 cup canola oil (or whatever kind of oil you like to use)
1 egg
1 cup buttermilk or 1 cup milk with 1 tsp. lemon juice
1 tsp. vanilla
2 and 1/2 cups flour
1 tsp. baking soda
1 tsp. salt
1 and 1/2 cups rhubarb

Topping:
1/2 cup sugar
1/4 tsp. cinnamon
1 Tblsp. cold butter or margarine

Combine brown sugar and oil, add egg; mix well. Beat in buttermilk and vanilla. Combine the flour, baking soda, and salt; stir into brown sugar mixture just until combined. Fold in the rhubarb. Pour into two greased loaf pans.

For topping, combine sugar, cinnamon, and butter until crumbly, sprinkle over batter. Bake at 350 degrees for 50 to 60 minutes or until toothpick comes out clean. Cool for 10 minutes before removing from pans.