Low FODMAP Cranberry Crisp with Grapes & Citrus

Name: Low FODMAP Cranberry Crisp with Grapes & Citrus
Prep time: 5 min
Cook time: 35 min
Total time: 40 min
Cuisine: American
Ingredients: 2 cups (300 g) black or red seedless grapes, (halved); 1 cup (106 g) fresh or frozen cranberries, (picked over washed and dried); 3 navel oranges, (peeled, sectioned and sections halved crosswise); ¼ cup (54 g) firmly packed light brown sugar; 1 tablespoon cornstarch; Pinch salt; 4 tablespoons (57 g) unsalted butter; Scant ½ cup (100 g) firmly packed light brown sugar; 1/3 cup (49 g) low FODMAP gluten-free flour, (such as Bob’s Red Mill Gluten Free 1 to 1 Baking Flour); Heaping 1/3 cup (35 g) old-fashioned rolled oats (not instant or quick oats); ( use gluten-free if following a gluten-free diet); 1/4 teaspoon cinnamon; 1/8 teaspoon salt