How to Make It
Cut dough into 1-inch pieces, and chill for 10 minutes. Preheat oven to 375°F. Stir together sugar, melted butter, and lemon zest in a large bowl. Add chilled dough pieces and blueberries; gently toss to coat.
Transfer dough mixture to a nonstick loaf pan coated with cooking spray. Let stand in a warm place until dough is slightly puffed, about 40 minutes.
Bake in preheated oven until golden brown, about 20 minutes. Let rest in pan for 5 minutes. Meanwhile whisk together powdered sugar and lemon juice. Remove bread from pan, and drizzle with powdered sugar mixture.