Strawberry Rhubarb Crisp - Once Upon a Chef

Ingredients

• 1 lb rhubarb stalks, (trimmed and sliced ½-in (13-mm) thick (about 4 cups))
• ½ lb strawberries, (hulled and quartered (about 2 cups))
• ½ cup granulated sugar
• 1½ tablespoons cornstarch
• 1 teaspoon vanilla extract
• ¾ cup all-purpose flour, (spooned into measuring cup and leveled-off)
• ½ cup (packed) light brown sugar
• 2 tablespoons granulated sugar
• ¼ teaspoon salt
• 6 tablespoons unsalted butter, (cut into ½-in (13-mm) cubes)
• ¾ cup old fashioned rolled oats
• ½ cup chopped pecans
• Lightly sweetened whipped cream or vanilla ice cream,