01 - Line an 8x8-inch square baking pan with parchment paper, ensuring overhang for easy removal.
02 - In a large mixing bowl, combine rolled oats, nut butter, honey or maple syrup, melted butter, vanilla extract, and salt until fully integrated. Press mixture firmly into the prepared pan and refrigerate while making the gummies.
03 - Pour fruit juice into a small saucepan. Sprinkle unflavored gelatin evenly over the juice and let stand 5 minutes. Gently heat over low, stirring until gelatin is dissolved completely. Stir in honey or agave syrup. Pour mixture into a parchment-lined small baking dish. Refrigerate for 45 to 60 minutes until set.
04 - Remove set gummy slab from the refrigerator. Slice into small cubes.
05 - Retrieve chilled oat base. Evenly scatter homemade gummy cubes, freeze-dried fruit, and freeze-dried candy across the surface. Press gently to help toppings adhere.
06 - Return pan to the refrigerator for 10 to 15 minutes to set the toppings.
07 - Lift the snack slab out using parchment paper overhang. Slice into 12 bars and serve immediately.