Ingredients Filling: 2 pounds rhubarb stalks, sliced 1/2 inch thick 1 1/4 cups sugar 1 pounds strawberries, hulled and quartered 3 tablespoons cornstarch 2 teaspoons fresh lemon juice 1 teaspoon pure vanilla extract Topping: 1 stick (4 ounces) unsalted butter, softened 1 1/2 cups light brown sugar 1 1/2 cups all-purpose flour 1 1/4 cups […]