Maricastana ★ 4.3
Maricastana in Madrid's Chueca is the 100 percent gluten-free bistro since 2013, with celiac-certified Italian pastas, Spanish tortilla and the dedicated gluten-free kitchen handling no wheat at all.
Tip: Open Mon-Sat 13:00 to 24:00. The gluten-free pasta carte runs 14 to 18 euros; book five days ahead for weekend.