Place the Dijon mustard, garlic, coconut aminos, balsamic vinegar, and honey in a bowl and whisk until well blended.
2 tbsp. Dijon mustard, 2 garlic cloves, ¼ cup coconut aminos, 1 tbsp. balsamic vinegar, 1 tbsp. raw honey
Season the steaks with salt and pepper on both sides.
4 sirloin steaks, Sea salt and freshly ground black pepper
Baste the steak with the mustard sauce and bring it to room temperature for 10 to 15 minutes.
Preheat grill to medium-high.
Grill the steaks for 3 to 4 minutes on both sides, and let rest for 4 to 5 minutes before serving.