Cook pasta in a large saucepan of boiling water, according to packet instructions. Drain cooked pasta and rinse under cold water. Set aside in a large bowl.
In a small bowl, combine the basil pesto and lemon juice to make the salad dressing; then gently mix the pesto dressing through the pasta.
In a large mixing bowl, combine the pasta (with dressing), and tomato, onion, lettuce and chickpeas.
Serve as a main item, or in half-size serves for a tasty side dish.