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Preheat oven to 400°; grease a 13x9-inch pan.
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Combine flour and baking soda; set aside.
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In medium bowl using mixer, cream butter and sugar until light and fluffy.
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Stir in the flour mixture until well-blended.
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Beat in the oats with a wooden spoon (dough should be crumbly).
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Press half of the dough into pan.
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Spread jam over it.
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Crumble the remaining dough over jam and pat lightly to cover.
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Bake 20-25 minutes.
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While warm, cut into bars and remove from pan.