South Indian Tamarind Glazed Salmon

Name: South Indian Tamarind Glazed Salmon
Ingredients: 2 wild-caught salmon fillets (skin on); 1 medium-sized shallot, finely diced; 2 garlic cloves, finely diced (or 1/2 teaspoon garlic powder); 2-3 curry leaves; 1 tablespoon virgin coconut oil; 3 tablespoons tamarind concentrate (not pulp); 1 1/2 teaspoons soy sauce; 2 tablespoons honey; 2 teaspoons light brown cane sugar; 1 /2 teaspoons red chili powder; 1/4 teaspoon freshly ground black pepper; Pinch salt (to taste); few torn cilantro leaves (fresh); red onion, finely sliced (optional)