A good twist on traditional nachos, these come from Linda McCartneys World Of Vegetarian Cooking. In fact, I did not make the sweet potato part, but I did make the rest of the recipe, and really loved the tomato/bean sauce. Omitting the sweet potatoes decreases cooking time by approx 60 minutes. I used only one whole green pepper, since I had no red pepper. I also made a spicy avocado guacamole, (see notes at end of recipe), and whipped some sour cream to accompany this, we loved it. Hope you enjoy them too!