Marinate the beans in enough salad dressing to coat them; let marinate for at least 30 minutes and preferably an hour.
On a large salad plate, arrange the greens.
Distribute the beans, tomatoes and cucumber slices onto the greens.
Fan out the avocado slices, then place them in the center.
Pour the salad dressing, including the marinade you used for the beans, over the vegetables to taste.
Sprinkle the seed mixture and black pepper over the dish, and enjoy!