Preheat oven to 350°.
Spray a 9×9-inch pan with nonstick spray and line with parchment paper, letting excess extend over sides.
In bowl of food processor fitted with blade, add 1 ½ cups flour, oats, ¾ cup brown sugar, 1 teaspoon salt, and 1 teaspoon cinnamon.
Pulse 4 – 5 times to mix dry ingredients together.
Add cubed cold butter to processor; pulse together until pea-size pieces form and mixture is crumbly. (If you do not have a food processor, mix dry ingredients together and use a pastry blender to cut butter into dry ingredients.)
Reserve 1 cup crumb mixture and store in freezer until ready to use.
Press remaining crumb mixture into bottom of prepared pan.
Bake until set, 10 to 12 minutes; let cool completely.
In a medium bowl, stir together strawberries, remaining ¼ cup flour, remaining ¼ cup brown sugar, remaining ½ teaspoon cinnamon, and remaining ¼ teaspoon salt.
Spread over cooled crust and top with reserved crumb mixture and almonds.
Bake until mixture is bubbly around edges, 30 to 35 minutes.
Let cool completely in pan on a wire rack. Cut into 16 bars.