Pesto Pasta Salad

Note From Cheri:
I came up with this pasta salad as a picnic side dish. While it does travel well, don't let that stop you having it at home.

1/3 cup pesto (follow this link for a recipe) 8 oz. pasta (spirals or any other small shaped pasta works well) 1/2 small red onion, chopped 3 large fresh tomatoes, chopped 1 chopped green bell pepper 1/4 cup balsamic vinegar

Serves 4 Cook pasta according to package instructions. Drain. Mix vinegar and pesto together until well blended. Add all ingredients to pasta in a large bowl and mix well.