Tasty salmon in a blanket of bread.
The item id for Sandwich Salmon in unturned is 1399. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Consumeable
Size_X: 1
Size_Y: 1
Size_Z: 0.3
Food: 90
Blueprints: 1
Blueprint_0_Type: Supply
Blueprint_0_Supplies: 2
Blueprint_0_Supply_0_ID: 460
Blueprint_0_Supply_0_Amount: 2
Blueprint_0_Supply_1_ID: 513
Blueprint_0_Supply_1_Amount: 2
Blueprint_0_Level: 2
Blueprint_0_Skill: Cook
Blueprint_0_Build: 27
ConsumeAudioClip: Sounds/EatCrunchy.mp3