Beef with grain

1 1/2 lbs sirloin steaks, tips salt ground black pepper 1/4 cup vegetable oil 10 ounces white mushrooms , wiped clean and sliced thin 1 medium onion , minced[...]

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[...]