Begin by thinly slicing your Roma tomato, mini cucumber, red onion, and roasted red pepper into approximately 1/4 inch thick pieces.

Lay two slices of whole wheat bread flat on a clean surface, and spread a generous scoop of hummus evenly across one slice.

Layer the sliced Roma tomato, cucumber, red onion, and roasted red pepper on top of the hummus-smeared slice, then add fresh arugula.

Place the second slice of bread on top of the layered veggies and gently press down to meld the ingredients together.

Slice the completed sandwich diagonally using a sharp knife and serve immediately.