01 - Line a baking sheet with parchment paper. Break matzo sheets into large pieces and arrange in a single layer on the prepared sheet.
02 - Melt the chocolate and butter together in a heatproof bowl over a saucepan of simmering water, stirring until smooth. Alternatively, microwave in 20-second bursts, stirring between each, until fully melted.
03 - Pour the melted chocolate over the matzo pieces, spreading evenly with a spatula to cover each piece completely.
04 - Immediately sprinkle with chopped nuts, dried fruit, and a pinch of flaky sea salt if desired while the chocolate is still warm.
05 - Refrigerate for at least 30 minutes, or until the chocolate is fully set and firm to the touch.
06 - Break into smaller pieces and serve immediately or store for later enjoyment.