As for the streusel topping, you'll need extra of a few of the ingredients you've already compiled for the bread. The streusel ingredients include unsalted butter, brown sugar, flour, and cinnamon.
In a separate bowl, mix together flour, brown sugar, cinnamon, and salt ... The next day, pre-heat your oven to 350 degrees. Sprinkle streusel evenly over the top of the bread mixture.
They are simply halved and cored, which creates a handy and tasty vessel for the oat and walnut streusel topping mounded ... packed brown sugar 1/4 teaspoon ground cinnamon 1/8 teaspoon ground ...