1 3/4 sticks butter, cut into pieces, plus more for greasing pan
1 1/2 cups all-purpose flour
1 1/2 cups oats
1 cup packed brown sugar
1 tsp baking powder
1/2 tsp salt
10-12 ounce jar of strawberry preserves
Preheat the oven to 350 degrees F. Butter a 9-by-13-inch rectangular pan. Mix together the butter, flour, oats, brown sugar, baking powder and salt. Press half the oat mixture into the prepared pan. Spread with the strawberry preserves. Sprinkle the other half of the oat mixture over the top and pat lightly. Bake until light brown, 30 to 40 minutes. Let cool completely, and then cut into squares.