Roasted Salmon with Sunchoke Galettes and Parsley Vinaigrette

Name: Roasted Salmon with Sunchoke Galettes and Parsley Vinaigrette
Ingredients: 1 (1 1/2) pound salmon fillet; 1/2 teaspoon mustard seed; 1 teaspoon coriander seed; Kosher salt and freshly ground black pepper; 4 tablespoons olive oil, divided; 4 sunchokes, very thinly sliced; 1/2 cup parsley leaves; 1 tablespoon lemon juice; 1 tablespoon grainy mustard