1. Prepare sandwiches: Choose your favorite sandwich ingredients, such as sliced bread, ham, cheese and vegetables.

2. Steamer heating: add enough water to the steamer and boil the water.

3. Use a steaming net or tray: put the steaming net or tray into a steamer to ensure a sufficient distance from the water surface.

4. Place the sandwich: Place the prepared sandwich on a steaming net or plate.

5. Cover: Cover the steamer and make sure it is sealed.

6. Cooking Sandwich: Put the sandwich in a steamer and cook for a few minutes on medium heat, depending on the required heating degree, the thickness and composition of the sandwich.