Preheat oven to 350°. Line an 8x8-inch baking pan with parchment paper, and spray with baking spray with flour.
In a medium bowl, stir together flour, oats, melted butter, sugars, and salt with a wooden spoon until crumbly. Press half of mixture into bottom of prepared pan. Sprinkle with strawberries, and cover with Quick Strawberry Jam. Sprinkle remaining crumble on top.
Bake until golden brown and bubbly, 55 minutes to 1 hour. Let cool on a wire rack for 20 minutes. Refrigerate for at least 1 hour before slicing.
Recipe by Bake from Scratch at https://staging.bakefromscratch.com/strawberry-jam-crumble-bars/