Preheat your oven to 180℃. Arrange the sourdough slices on a baking sheet, drizzle with olive oil and toast in the oven. Turn on the grill of your oven. Spoon some marinara sauce on each slice of toast, followed by 60ml of grated mozzarella and a few slices of salami. Sprinkle some dried oregano over and place under the grill until the cheese is melted and bubbly. Remove from the oven, top with fresh basil leaves and serve immediately.
Add the chopped chocolate to a heatproof bowl set over a saucepan with barely simmering water to melt. Stir every now-and-then until completely melted. Take from the heat. Line a small-hole muffin tin with paper cups. Spoon about half a teaspoon chocolate into each cup and give it a swirl so that the chocolate covers the base of the paper cup. Add about three blueberries and two pistachio nuts to the cups and then drizzle with another half teaspoonful of melted chocolate. Place some more blueberries and nuts on each cluster and give each a final drizzle of chocolate. Allow to set for at least 30 minutes. Gently remove the clusters from the paper cups and serve. Do not keep the clusters in the refrigerator.