3/4 c. butter, softened
1 c. packed light brown sugar
1 1/2 c. rolled or quick oats
1 1/2 c. all-purpose flour
1/2 tsp. salt
1/2 tsp. baking soda
10 oz. jar red-raspberry preserves (or whatever flavor you want)

Preheat oven to 400°F. Grease a 9x13-inch baking dish. Beat butter and brown sugar in a large bowl (at medium speed) until light and fluffy (about 1 minute). Add oats, flour, salt, and baking soda to the bowl; mix until crumbly.

Press half of the mixture into a prepared baking dish to form a "crust". Spread preserves evenly over oat mixture. Sprinkle remaining oat mixture over preserves.

Bake at 400°F for about 20 minutes (or until light brown). Cool completely before cutting into bars. Store in an airtight container.