Start by washing all your vegetables thoroughly. Julienne the cucumber and carrot, slice the bell pepper, and thinly slice the red onion. If you haven't already, slice the avocado.
If you prefer a bit of crunch, toast your whole grain or multigrain bread slices until golden brown.
Take one slice of bread and spread a generous amount of hummus on one side. This will serve as the base of your sandwich.
Begin layering your julienned cucumber, carrot, and sliced bell pepper on top of the hummus. Next, add the avocado slices, followed by the alfalfa sprouts and lettuce leaves. Finally, sprinkle the thinly sliced red onion on top, adding salt and pepper to taste.
Place another slice of bread on top, hummus side down, to complete your sandwich. Gently press it down to help all the ingredients stick together.
Use your knife to cut the sandwich in half, either diagonally or straight, depending on your preference. Serve immediately, or wrap it up for a lunch on-the-go!