In a bowl, whisk all ingredients (except tofu). Add the tofu cubes and flip them over so they are well coated. Marinate for at least 1 hour in the refrigerator.
Remove the cubes from the marinade (keep the marinade) and place the cubes on six metal or wooden skewers.
Cook brochettes on the grill for 10 to 15 minutes. Brush the skewers with the marinade preserved during cooking.