Place all ingredients except for oats in a large microwave safe bowl. Heat for about a minute or two, just until peanut butter is a little melty. Stir with a large spoon until mixture is creamy and well blended.
Stir in oats until fully incorporated.
Press mixture into an 8x8 pan. Cover and refrigerate until chilled before serving.
To make the topping as pictured: Melt 1 cup white chocolate chips in the microwave. Allow to cool for a few minutes and then spoon into a quart size zipper seal bag. Snip off just one corner and squeeze in a zig zag design over top of bars. Sprinkle lightly with a teaspoon of coarse sea or kosher salt. These bars keep very well in the refrigerator for up to two weeks or in the freezer for several months.