Black Sesame-Crusted Beef

1 x 800 g beef fillet
½ cup black sesame seeds
½ cup orange juice
1 lime, juiced
MARINADE:--
½ cup light GF soy sauce
3 tbsp brown sugar
2 tbsp SIDS LOW SUGAR RASPBERRY VINEGAR
2 tsp sesame oil
2 tsp mirin
2 tsp ginger, finely grated

In a large bowl or dish mix together SIDS LOW SUGAR RASPBERRY VINEGAR and all the marinade ingredients. Tie the beef fillet into a neat roast with kitchen string. Place the beef fillet in the marinade and refrigerate for at least 2 hours or overnight.
Prepare the barbecue for indirect cooking over medium heat. (190°C to 230°C) If you are using a Weber Q barbecue, set up your barbecue with a convection tray and trivet.
Spread the black sesame seeds on a tray or chopping board. Remove the fillet from the marinade, shake off the excess marinade and roll in the black sesame seeds. Reserve the marinade.
Roast the fillet over indirect medium heat, with the lid closed, for 30 minutes.
While the beef is cooking, prepare the Ponzu sauce. In a saucepan, combine the reserved marinade, orange juice, and lime juice. On a side burner or stovetop, heat over medium heat until the sauce has reduced and thickened slightly. Set aside to cool while the beef is roasting.
When the beef has finished cooking, remove from the barbecue and set aside to rest for 15 minutes. Once rested, thinly slice the beef, pour half of the Ponzu sauce over the beef, and garnish with the microgreens.