Place the shredded cabbage, sliced onion and minced garlic in a large mixing bowl and toss to combine. Set aside
In a small saucepan combine the olive oil, vinegar, and honey over medium heat. Stir until it comes to light bubble then remove from the heat. Stir in the sea salt and dried mustard and stir again. Let the mixture cool for 2-3 minutes before tossing it with the cabbage.