Strawberry Rhubarb Cobbler

Name: Strawberry Rhubarb Cobbler
Prep time: 15 min
Cook time: 55 min
Total time: 1 h 10 min
Cuisine: American
Ingredients: 1 1/4 pounds (570 g) fresh rhubarb stalks, (cut into large chunks (about 4 cups by volume)); 10 ounces (280 g) strawberries, (hulled and halved); 1/2 cup (99 g) sugar; 1 tablespoon cornstarch; Pinch of salt; 1 cup (145 g) low FODMAP gluten-free all-purpose flour, (such as Bob’s Red Mill Gluten-Free 1 to 1 Baking Flour); 1/4 cup (35 g) fine cornmeal; 2 tablespoons sugar; 1 1/2 teaspoons baking powder; (use gluten-free if following a gluten-free diet); 1/2 teaspoon salt; 5 tablespoons unsalted butter, (cut into pieces); 6 tablespoons lactose-free whole milk; 1 large egg, (beaten)