Fish for One: The Ultimate Easy Parchment Packet Dinner

Fish for one is easy to manage in a parchment packet: one fillet, a small handful of thinly sliced vegetables, and a little butter or olive oil bake together on a sheet pan. The enclosed packet holds moisture around the fish, while lemon, herbs, and cooking juices form a light sauce. You get a portioned dinner without a skillet to scrub or several side dishes to coordinate.

The technique is called en papillote, French for “in paper.” It works particularly well for solo cooking because you can build the meal around a single fish fillet and use only the vegetables you need. The main points are simple: choose vegetables that cook quickly, seal the parchment securely, and check the fish before serving.

Choosing fish and vegetables that cook together

Cod, haddock, salmon, and trout all work well in parchment. For one serving, choose a fillet weighing about 5 to 6 ounces (140 to 170 grams). Thickness affects cooking time more than weight, so a thick piece of cod will need longer than a thin trout fillet.

Use thawed fish for the recipe below. Frozen fish takes longer to cook and can release enough water to dilute the sauce. Thaw it in the refrigerator according to the package directions, then pat it dry.

Vegetables in parchment need to become tender within the fish’s relatively short cooking time. Zucchini, cherry tomatoes, spinach, and thin asparagus are suitable choices. Slice zucchini thinly and halve the tomatoes so they soften readily.

Raw potatoes, thick carrot slices, and large broccoli florets are less dependable here. They may still be firm when the fish is done. Cook dense vegetables separately or precook them before adding them to the packet.

Keep the vegetable layer modest. A tightly packed mound makes the packet harder to close and can cook unevenly.

Fish for one with lemon, zucchini, and tomatoes

This recipe makes a complete light dinner. For a more substantial meal, serve it with bread, rice, or couscous to catch the juices.

Yield: 1 serving
Prep time: 10 minutes
Cook time: About 12 to 18 minutes
Total time: About 25 to 30 minutes
Equipment: Rimmed baking sheet, parchment paper, instant-read thermometer

Ingredients

– ½ cup thinly sliced zucchini, about 2 ounces (60 grams)
– ⅓ cup cherry tomatoes, halved, about 2 ounces (60 grams)
– 2 teaspoons olive oil (10 milliliters), divided
– ⅛ teaspoon fine salt, divided, plus more to taste
– Freshly ground black pepper
– 1 fish fillet, 5 to 6 ounces (140 to 170 grams), thawed and patted dry
– 2 thin lemon slices
– 1 small sprig fresh dill or thyme, or 1 teaspoon chopped fresh parsley

Instructions

1. Heat the oven. Preheat to 400°F (200°C). Check that your parchment paper is rated for this temperature. Cut a piece approximately 15 by 18 inches (38 by 46 centimeters).

2. Arrange the vegetables. Fold the parchment in half, then open it like a book. Place the zucchini and tomatoes near the crease on one half, leaving a generous border for sealing. Toss with 1 teaspoon of the olive oil, about half the salt, and a little pepper.

3. Add the fish. Set the fillet on the vegetables. Drizzle with the remaining teaspoon of oil and season with the remaining salt and pepper. Lay the lemon slices and herbs on top.

4. Seal the packet. Fold the empty half of the parchment over the food. Starting at one end, make small, overlapping folds around the open edges. Crease each fold firmly and tuck the final corner underneath. Leave some room above the fish for steam.

5. Bake. Transfer the packet to the baking sheet. Bake for approximately 12 to 18 minutes. Begin checking a thin fillet around 10 to 12 minutes; a thick piece may need 20 minutes or longer.

6. Check the temperature. Carefully open one edge, directing escaping steam away from your face and hands. Insert an instant-read thermometer into the thickest part of the fish. It should reach 145°F (63°C). If it hasn’t, fold the packet closed and return it to the oven for a few minutes before checking again.

7. Serve. Transfer the packet to a plate and open it carefully, or slide the fish, vegetables, and juices onto the plate. Taste before adding more salt or lemon.

Packet sealing and fish doneness

A good seal keeps the cooking environment moist, but the packet does not need to be perfectly airtight. Small, closely overlapping folds hold better than one large fold along the edge. If the paper keeps springing open, crease it more firmly and tuck the loose end underneath.

Avoid wrapping the parchment tightly against the food. The packet needs space to hold steam, and the edges should sit beyond the ingredients so cooking juices stay inside.

Parchment may brown in the oven, but it should not touch a heating element or an open flame. Don’t use wax paper as a substitute, and don’t put a parchment packet under the broiler.

Cooking time is only an estimate. Oven temperature, fish thickness, and the amount of vegetables all affect how quickly dinner is ready. A puffed packet shows that steam has formed; it does not establish fish doneness.

An instant-read thermometer provides the clearest check. Insert it sideways into a thin fillet if necessary, keeping the probe tip in the center of the flesh rather than against the hot pan. Properly cooked fish should also separate readily with a fork, but appearance alone is less reliable than temperature.

Small changes without complicating dinner

Once the basic method is familiar, change the seasoning or substitute vegetables with similar cooking times. Try thin asparagus with dill and lemon, or zucchini with tomatoes and a teaspoon of drained capers. A small pat of butter can replace the oil on top of the fish.

Watery additions need restraint. The vegetables and fish release moisture as they cook, so this recipe needs no extra broth or wine. Too much liquid leaves the fish sitting in a thin puddle and makes the packet harder to handle.

For minimal cleanup, assemble the packet directly on the baking sheet and eat from the opened parchment set on a plate. Keep the sheet pan underneath during baking even if the seal looks secure; it catches leaks and makes the packet easier to move.

If you save part of the meal, transfer it to a covered container and refrigerate within two hours, or within one hour when the surrounding temperature is above 90°F (32°C). Use refrigerated leftovers within three to four days and reheat to 165°F (74°C). The fish’s texture is best when freshly cooked, which is a useful reason to make just one packet.