Start with a sterile wide mouthed jar.
Pierce the tomatoes at least 4 times each with a skewer and fill the jar.
Add the fresh herb sprigs.
Mix the sauces and sherry in a small bowl or glass and mix with 2 tablespoons of vodka.
Pour this into the jar of tomatoes and then fill up with vodka.
Pop on a lid and shake the jar.
Store in fridge overnight for flavours to infuse.
Label jar saying use within 2 weeks.