Serve these spicy, brothy mussels with rice for a quick, satisfying weeknight meal.
In a large pot with a lid, melt butter over medium-high. Add garlic and ginger and cook until fragrant, 1 minute. Whisk in coconut milk and curry paste and bring to a simmer over high. Add mussels and stir to combine. Cover and reduce heat to medium-high. Cook until mussels open, 5 minutes, stirring once. (Discard unopened mussels). Remove pot from heat and stir in lime juice and cilantro.