Vinegar Roasted Vegetables

Name: Vinegar Roasted Vegetables
Ingredients: 1 1/2 cups whole white mushrooms; 1 medium yellow onion, chopped into 1-inch chunks (about 1 cup); 1 red bell pepper, chopped into 1-inch chunks (about 1 1/2 cups); 1/2 medium head cauliflower, cut into large florets (about 1 1/2 cups); 2 tablespoons extra-virgin olive oil; Kosher salt; 1/4 cup white vinegar; 2 tablespoons chopped fresh parsley