Published: 8:01 AM CST February 5, 2021 Updated: 8:01 AM CST February 5, 2021 ST. LOUIS — Italian restaurateur Mario Iaccarino will open his first U.S. restaurant right here in St. Louis, and with it, he'll bring Mediterranean dishes inspired by his childhood in southern Italy. Casa Don Alfonso will open its doors inside The Ritz-Carlton in Clayton this March, officials said this week. The new restaurant was first announced in August. Iaccarino's family first opened Don Alfonso 1890 in southern Italy, and the restaurant now has locations all over the world, including Toronto and Macau, China. When it opens its doors, chef de cuisine Sergio Chierego will offer breakfast, brunch, lunch and dinner services at Casa Don Alfonso.