Raspberry Breakfast Bars

Name: Raspberry Breakfast Bars
Ingredients: For the crust and crumb:; 1 1/2 cups all-purpose flour; 1 cup firmly packed dark brown sugar; 1 1/4 cups rolled oats; 3/4 teaspoon salt; 3/4 teaspoon baking powder; 1/2 teaspoon baking soda; 1/2 teaspoon cinnamon; 3/4 cup (1 1/2 sticks) unsalted butter, cut into 1-inch pieces; For the raspberry filling:; 1/4 cup firmly packed dark brown sugar; 1 tablespoon grated lemon zest; 2 tablespoons all-purpose flour; 1 pound raspberries, fresh or frozen; 1/4 cup fresh lemon juice; 2 tablespoons unsalted butter, melted and cooled