How to Make It
Cut onion lengthwise into thin slices. Thinly slice bell pepper. Melt butter in a large nonstick skillet over medium-high; add sliced onion, and sprinkle with sugar. Cook, stirring often, 15 minutes. Add bell pepper slices, and cook, stirring often, until onions are browned and tender and pepper slices are tender, about 10 minutes. Remove from heat, and sprinkle with salt and pepper.