Allegro restaurant takes over former Indigo Grill space in Little Italy A lemon tree outside the entry doors of Allegro, a new modern Italian restaurant opening Valentine’s Day in Little Italy. (Courtesy photo) Print Allegro, a new modern Italian restaurant from the San Diego Dining Group, plans to open its doors on Valentine’s Day in Little Italy. Allegro takes over the space at 1536 India St. formerly occupied by Indigo Grill, which closed last year after a 20-year run. Allegro joins San Diego Dining Group’s three Gaslamp Quarter restaurants: Greystone Steakhouse, Osetra and Osteria Panevino. Allegro’s menu includes hot and cold appetizers of shellfish and charcuterie, housemade pastas, steaks, salads, sides, flatbreads and plated entrees.