Meanwhile, heat a 10-inch pan (stainless steel or nonstick) on medium/high. When it is hot, place butter in the pan, Swirl it around to coat bottom and up 1/2 inch around the edges. When butter is bubbly, add olive oil. Add sliced zucchini and diced bell pepper. Mix it and let it cook for 3 mins. Mix in the green onions and tomatoes and cook for 1 minute. Season with 1/8 tsp of salt and 3 grinds (about 1/8 tsp) of freshly ground pepper.