Preheat oven to 400 degrees F. Line baking sheet with parchment paper.
Prepare salmon. Season fish with salt and pepper. Combine honey, lime juice, olive oil, and Chinese hot mustard in a small bowl. Pour marinade over the salmon and let sit for 10 minutes.
Combine white and black sesame seeds with coconut flakes. Sprinkle mixture on top of the salmon. Lay salmon on prepared baking sheet and bake for 12-14 minutes or until the fish flakes easily.
Meanwhile, make green curry sauce. Heat 2 tablespoons oil in a large saute pan over medium heat. Add shallots, garlic, ginger, Thai chile if using, and lemongrass. Saute the aromatics until softened, about 2 minutes. Add green curry paste, cumin, coriander, and turmeric, stirring to combine. Saute for 1 more minute.
Add coconut milk and bring to a simmer. Reduce heat to low and continue to simmer for 5 minutes. Season sauce with brown sugar, fish sauce, and lime juice and simmer for 1 more minute.
Ladle green curry sauce on the bottom on a serving plate. Lay salmon on top and garnish with fresh basil. Serve with lime wedges on the side.
Notes
You can cook the green curry sauce up to 1 day in advance. Heat the sauce in a saucepan over medium heat until warm and serve with the salmon.