Preheat the oven to 350°F. Line an 8? x 8? x 2? pan in one direction with parchment paper, allowing it to go up the opposing sides. Lightly grease the parchment paper and the exposed pan, or coat with a non-stick spray.
Stir together all the dry ingredients, including the fruit and nuts. In a separate bowl, whisk together the vanilla, melted butter or oil, liquid sweeteners and water. Toss the wet ingredients with the dry (and peanut butter, if you’re using it) until the mixture is evenly crumb