Beef Stew with Mushrooms, Rosemary, and Tomatoes

4 pounds boneless beef chuck, cut in 2" pieces½ cup all-purpose floursalt and pepper¼ cup olive oil2 medium onions, chopped4 garlic cloves, chopped1 tablespoon tomato paste1 cup dry red wine2 cups beef broth4 medium carrots, peeled and sliced ¼" thick1 cup chopped canned tomatoes1 sprig fresh rosemary1 bay leaf2 tablespoons unsalted butter1 pound white mushrooms,… Continue reading Beef Stew with Mushrooms, Rosemary, and Tomatoes