Anarkali Restaurant (Victoria Rd, Queens Park, Glasgow) after 25 years experience this is without doubt the finest restaurant serving Indian cuisine in Glasgow.
The weekend queues can be lengthy given its popularity, however Cafe India, Mothers Indian cafe, Balbir's, Ashoka, all good Indian restaurants, unfortunately do not come close in quality.
Another notable restaurant in Glasgow are Delhi Darbar, Bishopbriggs, although IMO, not as good as the Anarkali, is still one of the finest restaurants serving Indian Cuisine.