Melt the margarine in a medium saucepan over medium heat. Add the ackee, yellow onion, and garlic and sauté about 3 minutes, until the onions start to get slightly soft. Add the green onions, mustard, curry, seasoning salt, pepper, and thyme. Mix well to combine and lower the heat to medium-low. Add the coconut milk, bring to a low simmer, and let cook about 10 minutes, unt