Thinly slice the apple and avocado, and chop the walnuts into small pieces.

Heat the panini press and coat both sides of the bread with olive oil.

Layer the bread with hummus, apple, avocado, basil, and walnuts. Coat the other slices of bread with more hummus, and pile on top.

Place the sandwiches in the panini press and cook for about 5 minutes, until browned. Serve immediately.