Spray 9 x 13" springform pan with pan coating. Line bottom of pan with parchment paper.
In bowl of standing mixer fitted with flat paddle, mix flour, sugar and salt on low speed until combined, about 5 seconds.
With machine on low add the 8 ounces of butter one piece at a time until mixture resembles damp sand, 1 - 2 minutes.
Measure 1_ cup flour mixture into a medium bowl and set aside. Distribute remaining flour mixture evenly in bottom of prepared pan and press to form bottom crust.
Bake at 350 convection for 9 minutes or until edges begin to brown.
While crust is baking, add brown sugar and oats to reserved crust mixture. Toss to combine.
Using a pastry blender cut in remaining 2 tablespoons of butter. Reserve for topping.
Combine preserves, raspberries and lemon juice in a small bowl. Mash with a fork until combined but some berry pieces remain.
Spread filling evenly over hot crust. Sprinkle topping evenly over filling. Return to convection oven and bake 13 minutes or until topping is golden brown and filling is bubbling.
Cool to room temperature and remove pan sides.
Cut into 24 – two-inch squares.