Chopped Black Bean-Avocado Salad

2 tbsp lemon juice
1 tbsp whole-grain mustard
2 tbsp olive oil
1 cup black beans (adzuki beans work well too)
1 cup corn
1 avocado, diced
1/2 cup sweet red pepper
1/4 cup diced celery
2 green onions, trimmed and thinly sliced

Whisk together lemon juice and mustard in a large bowl. Add oil, and whisk until smooth. Add all remaining ingredients, and gently toss to combine. Season with salt and pepper, and serve.

(taken from the April 2007 issue of Vegtarian Times)