Make the sandwich spreads. In a blender or small food processor, make the White Bean spread by pureeing the white beans, olive oil, lemon juice, garlic, salt and pepper. Blend until smooth, adding 1 to 2 tablespoons of water if necessary to blend. Scoop out half of the puree. Make the Sun-Dried Tomato spread by adding the sun-dried tomatoes to the blender. Blend again, adding 1 to 2 tablespoons of water if necessary to blend.
Assemble 4 sandwiches with the bread, spreads, tempeh, watercress, tomato, cucumber, and avocado.