In a 2-quart saucepan, combine marinade, curry paste, brown sugar, coconut milk, white wine, and 1 tablespoon garlic. Bring to a boil, and then reduce heat to medium and simmer for 20 minutes, or until sauce thickens and is reduced by half. Remove from heat.
Heat the butter in a large saute pan over medium-high heat. Add mussels and the remaining garlic. Add 1/2 cup of sauce to mussels. Let simmer until mussels start to open, about 3 to 5 minutes. Transfer to a shallow serving bowl and ladle over remaining sauce. Garnish with green onions.
If mussels are not available, you can substitute shrimp.