I am not a fan of overly cooked bell peppers. To my palate they become bitter; look and taste slimy. However, put a plate of grilled, stir fried or sauteed bell peppers in front of me and that's a different story. This is from Martha Stewart's Everyday Food supplemental magazine. The trick is NOT to overcook the bell peppers to both maintain the sweet taste and the lovely colors. Try to use 2 different color of bell peppers if you can; orange, red, yellow or all three if you wish.