Godeungeo Gui

Name: Authentic Godeungeo Gui (Korean Grilled Mackerel)
Prep time: 15 min
Cook time: 15 min
Yield: 2
Cuisine: South Korea
Ingredients: 1 whole mackerel (godeungeo), about 350-400g (12-14 oz), cleaned and gutted; 1 teaspoon coarse sea salt; 1/2 lemon, cut into wedges for serving; 1 tablespoon vegetable oil (for greasing)