Baked Salmon in a Foil Packet

Preheat the oven to 375 degrees F (190 degrees C).

Heat olive oil in a skillet over medium heat and cook onions until soft and browned, about 10 minutes.

Season with marjoram and a little salt.

Remove from heat.

Place lemon slices in a single layer in a clean skillet over high heat and cook until lightly browned on both sides, about 3 minutes.

Add star anise and water and bring to a boil.

Remove from heat.

Cover a baking pan large enough to hold the salmon with sheets of aluminum foil, leaving an overhang on all sides.

Lay onions in a single layer on the bottom; place salmon fillet on top, skin-side down.

Rub fillet with salt and pepper.

Cover with lemon slices and star anise.

Fold up the edges of the foil over the salmon to create a packet, making sure to seal the edges well.

Bake in the preheated oven until salmon flakes easily with a fork, 35 to 40 minutes.

Remove from oven, open foil carefully, and serve.