When I first became a vegetarian, some 10 years ago, I used to eat these all the time. Not sure why I got out of the habit, maybe because I'm not a huge sandwich eater to start with, but having one today brought back all kinds of memories.
The only thing I wish I had added (but didn't have on hand) was maybe some red onion or peppercinis.
2 slices of whole grain bread
handful each of pea shoots and fresh spinach
1/2 of an avocado, sliced
1 small tomato, sliced
1 block of marinated, baked tofu, sliced (you can buy pre-packaged or make your own)
3-4 slices of cucumber
honey mustard dressing
Slather each slice of bread generously (trust me on this, be generous!) Top one slice with pea shoots, spinach and cucumber. Top the other slice with marinated tofu, tomato and avocado. Season with salt and pepper if desired and gracefully bring the two slices together. Be careful, those avocado slices are slippery little suckers and will try to escape!