1) Mash avocado. (Make sure you use a ripe avocado. It should be soft enough to touch that you can easily dent it with your fingertips. If not, leave it out on a warm counter a day or two until it is ripe!)
2) Spread avocado on your bread. Cover this with tomato slices. Add salt, pepper, and a good bunch of sprouts. Pour a little Italian dressing on the sprouts (they hold it fairly well).
3) Top with another slice of bread and enjoy. Beware, this can be messy!
Source of recipe: I used to get a similar sandwich at a sub shop where I used to live. Now I have to make my own!