Frozen Rhubarb Quick Bread in 70 Minutes

Instructions:

1. Preheat oven to 350°F (175°C) and grease a 9x5 inch loaf pan.
2. In a large bowl, whisk together the flour, sugar, baking powder, and salt.
3. In a separate small bowl, beat the egg, oil, and milk until smooth.
4. Pour the wet ingredients into the dry ingredients and stir until just combined; the batter should be thick and slightly lumpy.
5. Gently fold in the frozen rhubarb pieces using a spatula until evenly distributed, taking care not to overmix.
6. Transfer the batter to the prepared loaf pan.
7. In a small bowl, pinch together the streusel ingredients (flour, brown sugar, cinnamon, and cold butter) with your fingers until crumbly, then sprinkle evenly over the batter.
8. Bake for 55-60 minutes, or until the top is mahogany-colored and a skewer inserted into the center comes out with only a few moist crumbs attached.