Great healthy but grim looking halloween snack: hard boiled spider eggs (can also pass for dinosaur eggs). Frozen blueberries stain the imprint of cracked eggshells but magically leave no taste! Hard boil eggs as usual, but with frozen blueberries in the boiling water. After the eggs are mostly cooked, but still a teeny bit soft - crack them with a spoon and return them to the blueberry water. Let them sit in the stain at least until they cool but preferably overnight. Carefully peel the shells, but leave some behind for a "just hatched" effect if you like. Serve with pepper and grey sea salt for extra-goulish presentation!