1 3/4 sticks salted butter, cut into pieces, plus more for greasing pan
1 1/2 cups all-purpose flour
1 1/2 cup oats
1 cup packed brown sugar
1 teaspoon baking powder
1/2 teaspoon salt
One 10 to 12-ounce jar strawberry preserves
Preheat the oven to 350 degrees F. Butter a 9-by-13-inch rectangular pan.
Mix the butter, flour, oats, brown sugar, baking powder and salt. Put half the oat mixture into the prepared pan. Spread with the strawberry preserves. Sprinkle 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.