Combine the coconut butter, cacao powder, vanilla, and monk fruit sweetener in a food processor and blend until smooth and completely incorporated. You might need to scrape down the sides of the processor with a spatula half way through.
Line a large baking sheet with parchment paper or a silicon baking mat. Pour the chocolate mixture onto the baking sheet and use a spatula to spread it out evenly, into a thin layer.
Sprinkle the chopped and slivered almonds all over the top, then finish with a sprinkle of sea salt. You can let it harden at room temperature for about an hour, or put it on a flat surface in the fridge if you want it to harden quickly. This will take about 15 minutes.
Once the chocolate is completely hardened, use your hands to break it into pieces at whatever size you want.