Step 1:
The bread papers are 6x6 inches or 15x15 centimeters.
The salad leaf and tomato papers are 3x3 inches or 7,5x7,5 centimeters.

Step 6:
Make a paper ball

Step 5:
Prefold over these two lines, use the prefolded lines as guidance, see arrows.

Step 2:
Prefold

Step 4:
Prefold over these four lines.

Step 3:
Prefold over these two lines.

Step 10:
Valley-fold on both flaps

Step 8:
Fold over these two prefolded lines

Step 9:
Fold both corners inwards and the four edges upwards

Step 7:
Unfold

Step 16:
Make about four of these salad leafs.

Step 15:
Press the edges inwards

Step 12:
Close the model, see arrows and make sharper folding lines, see blue lines.

Step 11:
Fold over these two prefolded lines

Step 14:
Make (almost) random folds on the edges

Step 13:
Make three of these bread pieces

Step 21:
This is all you need for one completed Origami Club Sandwich.

Step 19:
Fold the edges downwards

Step 20:
Make about four tomato slices

Step 18:
Prefold.

Step 17:
Make (almost) random folds on the edges

Step 22:
These pictures show how the model is completed.