Unroll 1 refrigerated piecrust onto a parchment paper-lined baking sheet. Spread with 3/4 cup strawberry jam, leaving a 1/2-inch border. Mix 3/4 cup each oats and flour, 6 tablespoons melted butter, 1/3 cup brown sugar, 1/4 cup granulated sugar and a pinch of salt; squeeze into clumps and drop over the jam. Bake at 450 degrees F, 15 minutes. Let cool and cut into squares.
Photograph by Antonis Achilleos