Beef Tartare with Mustard Caviar

Ingredients

• Mustard Caviar

  • ½ cup (90 g) mustard seeds
  • ¼ cup (60 ml) apple cider vinegar
  • ¼ cup (60 ml) water
  • ¼ cup (55 g) sugar
  • ½ tsp salt

• Beef Tartare

  • ½ lb (225 g) beef top sirloin cap steak (not tenderized) (see note)
  • 2 tbsp (30 ml) olive oil
  • 2 tbsp flat-leaf parsley, finely chopped, plus more leaves for serving
  • 2 tbsp chives, finely chopped
  • 2 tsp capers, drained and chopped
  • 2 tsp (10 ml) Dijon mustard
  • 1 tsp (5 ml) lemon juice
  • ½ tsp (2.5 ml) Worcestershire sauce
  • Tabasco-style sauce, to taste