Preheat oven to 375°F. Spray a 13 X 9-inch pan with nonstick spray or line with parchment paper.

In electric mixer stir together flour, sugar, and salt.

With mixer on a low speed add 1 cup of butter, 1 piece at a time. Continue mixing until combined, it takes a couple minutes. It will be consistency of sand.

Set aside 1 1/4 cups of this mixture.

Press remaining flour mixture firmly into bottom of pan. Bake for 14 minutes.  Edges will be slightly browned.

Meanwhile, combine brown sugar, oats, and the reserved flour mixture. With your fingers, work in remaining 2 tablespoons of butter, until it is in small clumps.

Combine jelly, chopped raspberries, and lemon juice in a small bowl. Mash with a fork to combine. Be sure to leave some chunks of berries in there.

Spread filling evenly over hot crust. Sprinkle streusel topping over strawberries.

Bake for 22-25 minutes. Crust will be brown, and filling will be bubbly.

Remove from oven and cool completely before slicing.