Cover the beans with salted water in a medium pot. Bring to a boil, and simmer about 45 minutes. While the beans are cooking, combine the red bell pepper and the asparagus in a medium pan, cover with water, bring to a boil, and cook for about 3 minutes. Drain and rinse with cold water. To make the dressing, whisk together all dressing ingredients in a small bowl. Taste and adjust seasoning if desired. When the beans are done (tender but not mushy), drain and cool. In a serving bowl, combine the beans, asparagus and pepper. Pour 2/3 of the dressing over the mixture and toss gently. Add more dressing if you want. enjoy!