Line an 8x8-inch baking pan with parchment paper, leaving some parchment hanging over the sides for easy removal.
In a large mixing bowl, combine the old-fashioned oats, dried cranberries, sunflower seeds, pumpkin seeds, finely ground or very finely chopped almonds, cinnamon, pumpkin pie spice, and salt. Stir well to evenly distribute the ingredients.
Add the honey, creamy peanut butter, coconut oil, vanilla bean paste, and fresh orange zest to a small saucepan over medium-low heat.
Stir frequently until the peanut butter and coconut oil melt and everything combines into a smooth mixture. Don't bring it to a boil.
Pour the warm honey mixture over the oat mixture. Stir thoroughly until the oats, cranberries, seeds, and almonds are evenly coated.
Let the mixture cool slightly if it feels very hot, then gently fold in the white chocolate chips. This helps keep the chips from melting completely into the mixture.
Transfer the mixture to the parchment-lined 8x8-inch pan. Spread it evenly, then press it down firmly into one compact layer. Pay special attention to the corners and edges.
Sprinkle additional white chocolate chips and flaky sea salt over the top. Gently press the toppings into the surface.
Refrigerate for at least 1 hour, or until the mixture feels firm and set.
Lift the chilled oat slab from the pan using the parchment overhang. Use a sharp knife to cut into 36 bites. Serve chilled and enjoy!