Blend together flour, oats, brown sugar, baking soda and salt. Cut in butter until mixture is crumbly.

Preheat oven to 325 degrees. Press half of mixture into greased 15-by-10-inch pan. Bake in preheated oven 10 minutes or until set. Cool bars to room temperature.

Return oven temperature to 325 degrees. Spread jam over crust and top with remaining crumb mixture, pressing down gently. Return to oven and bake 15 to 20 minutes or until crust is golden brown. Makes 24 to 30 bars.