Grilled Peach Crumble | baking | Umami

Ingredients

• 1/2 cup all-purpose flour
• 1/2 cup chopped walnuts
• 3 tablespoons brown sugar
• 1 teaspoon kosher salt
• 1/2 teaspoon ground chai spice
• 1 tbsp vanilla bean
• 1 tbsp honey
• 1 tbsp maple syrup
• 1/2 cup (1 stick) unsalted butter, cubed and kept cold
• 2 pounds ripe peaches (about 4 peaches), pitted and halved
• 2 tablespoons olive oil
• Vanilla ice cream, for serving