1 cup packed light brown sugar
2 cups all-purpose flour
1⁄2 teaspoon baking soda
1⁄4 teaspoon salt
2 cups rolled oats
1 cup butter, softened
14 ounces guava paste (you can add more or less depending on how thick you prefer your fruit layer)
Preheat oven to 350 degrees F.
Grease a 13x9-inch pan, and line with foil or parchment paper.
Lightly grease paper/foil
Combine brown sugar, flour, baking soda, salt, and oats.
Cut in butter with a pastry cutters until mixture is crumbly.
Press half of the crust mixture into the prepared pan.
Slice the guava paste into enough pieces to cover the crust within 1/4 inch of the edge, and place in pan.
Sprinkle remaining crust mixture over guava paste layer, and lightly press down with the back of a fork or spatula.
Bake for 35-40 minutes in preheated oven, or until crust is lightly browned.
Allow to cool in pan on wire rack before cutting into 16-24 bars.