Cooking in parchment paper leaves you with food that is flavorful, tender, and totally kid-friendly. All you have to do is fill the pouch with your favorite fish—halibut, salmon, cod, or snapper—and seasonal veggies and twist the ends of the parchment. Presto! Dinner is served, and the kids—and adults—think it looks awesome.
Preheat oven to 400°.
Cut 4 (18-inch-long) pieces of parchment paper. Spoon corn and zucchini evenly onto center of each piece. Top evenly with asparagus, placing spears lengthwise on paper. Place fillets lengthwise over asparagus; top evenly with lemon slices. Place tomatoes around edges. Drizzle each serving with 1 teaspoon butter; sprinkle evenly with salt and pepper. Bring long sides of paper together; fold down tightly over fish and vegetables. Twist ends to enclose contents. Place packets on a large baking sheet.
Bake at 400° for 15 minutes. Place on plates. Let stand 5 minutes; cut open. Serve immediately.