Fish en Papillote

1 tablespoon olive oil 1 carrot, peeled and cut into julienne 1 small leek, peeled and cut into julienne 1 small zucchini, peeled and cut into julienne Kosher salt and freshly ground black pepper Squeeze lemon 2 small halibut or salmon fillets, about 5-ounces/140 g each 1 teaspoon fennel seed 1 teaspoon quatre-epices, or Chinese five-spice