Rhubarb Rolls

Name: Rhubarb Rolls
Cuisine: American
Ingredients: 3/4 cup whole milk; 4 Tablespoons unsalted butter, cubed; 2 1/4 teaspoons instant yeast ((1 packet); can also use active dry yeast); 2 Tablespoons granulated sugar; 1 large egg; 3/4 teaspoon salt; 3 1/4 cup all-purpose flour; 3 cups sliced rhubarb ((about 1/2 inch slices)); 1/2 cup granulated sugar; 2 Tablespoons lemon juice; 2 teaspoons cornstarch; 1 large egg (beaten); 1 Tablespoon water or milk; 2 Tablespoons rhubarb filling ((from above)); 1 cup powdered (confectioner's) sugar; 1-2 Tablespoons lemon juice ((as needed))