Paleo Cod Baked in Foil with Leeks and Carrots

Name: Paleo Cod Baked in Foil with Leeks and Carrots
Ingredients: 1 pound leeks , white and light green parts only, halved lengthwise, cut into 2-inch-long matchsticks, and washed thoroughly; 2 carrots , peeled and cut into 2-inch-long matchsticks; Kosher salt and pepper; 1/4 cup ghee , softened; 2 garlic cloves , minced; 1 1/2 teaspoons grated lemon zest , plus lemon wedges for serving; 1 teaspoon minced fresh thyme; 2 tablespoons minced fresh parsley; 1/4 cup water; 4 (6- to 8-ounce) skinless cod fillets , 1 to 1 1/4 inches thick