Vegetarian, Gluten-Free, and Vegan are on the menu, but the same kitchen also prepares what you avoid, so cross-contamination is possible. Tell staff what you react to, and ask how your dish is prepared before you order.
Tadka is an Indian restaurant on 24th Street in the Mission, San Francisco, open late with curries, biryanis, tandoori and naan. It has a vegetarian section and told us it has gluten-free and vegan options, but its menu marks no dish. Ask the staff which dishes fit your allergy; the kitchen has the final word.