Sheet Pan Passover Dinner

Name: Sheet Pan Passover Dinner
Ingredients: 1.5 pounds baby red potatoes; 7 tablespoons olive oil, divided; 2 teaspoons kosher salt, divided; 1 teaspoon ground black pepper, divided; 1 (1.5 pound) head green cabbage; 2 (6 inch) matzo sheets; 6 tablespoons chopped flat-leaf parsley, divided; 1 teaspoon lemon zest; 2 tablespoons Dijon mustard; 1 (2 pound) skin-on salmon fillet; 2 tablespoons sherry vinegar; 1 teaspoon Dijon mustard; 4 large hard-cooked eggs, chopped; 2 tablespoons chopped fresh chives; 2 tablespoons chopped cornichons; 2 tablespoons non-pareil capers, rinsed and drained