When you put together the simple ingredients for this crumble, you’ll think, “Ho hum…nothing special about this, but a great way to serve up this week’s bountiful supply of berries.” Then, when you take your first bite, you’ll check to see if maybe a little elfin showed up in your kitchen, when you weren’t looking, and added some caramel, or vanilla, or … something.  You’ll check the ingredients again on the recipe, and you’ll scratch your head, trying to remember if you didn’t add anything else than the required amount of flour, oats and sugar. Maybe it was brown sugar you added instead? Something happens when you cook this crumble.…