In a bowl, combine all of the ingredients minus the steaks, season to taste, and whisk until well emulsified.
2 tbsp. Dijon mustard, 2 tbsp. old-fashioned mustard, 2 tbsp. raw honey, 2 tbsp. apple cider vinegar, ¼ cup olive oil, 2 tbsp. coconut aminos, 2 garlic cloves
Season the steaks with sea salt and freshly ground black pepper.
Sea salt and freshly ground black pepper, 4 steaks
Pour the sauce over the steaks and let marinate for 30 to 45 minutes.
Preheat the grill to medium-high heat.
Pour the remaining marinade into a saucepan and bring to a light simmer; simmer for 10 to 12 minutes.
Grill the steaks for 3 to 4 minutes per side, depending on the thickness or preferred doneness.
Serve the steaks with honey-mustard sauce.