Beef with mushroom

4 cups salad greens (lettuce, chinese cabbage, spinach) * 3 cups beef roast rare, cut in strips * 2 each tomatoes cut in wedges 1 each green bell pepper cut[...]

2 teaspoons olive oil 1 red onion , chopped 1 zucchini , shredded 3 carrots , shredded 1 yellow bell pepper , chopped 1 celery , chopped 8 mushrooms , chopped[...]