Pumpkin Muffins with Pecan Streusel Topping Recipe

Name: Pumpkin Muffins with Pecan Streusel Topping Recipe
Ingredients: For the muffins:; 1 3/4 cups whole wheat flour; 1/2 cup oat bran; 3/4 cup brown sugar; 1 tablespoon baking powder; 2/3 cup mashed pumpkin; 1 cup skim milk; 2 egg whites; 1 teaspoon vanilla extract; 2 teaspoons pumpkin pie spice; For the topping:; 8 pecan halves, finely chopped; 3 tablespoons brown sugar; 1 1/2 tablespoons whole wheat flour; 1 tablespoon butter