2 tablespoons olive oil
2 pounds top sirloin steak, diced
Kosher salt and freshly ground black pepper, to taste
1 medium sweet onion, diced
2 large carrots, peeled and diced
2 celery ribs, diced
3 cloves garlic, minced
8 ounces cremini mushrooms, halved
3 tablespoons all-purpose flour
2 tablespoons tomato paste
1/2 cup dry red wine
2 1/2 cups beef stock
4 sprigs fresh thyme
2 bay leaves
1 large russet potato, peeled and cut in 1/2-inch chunks
2 tablespoons chopped fresh parsley leaves