Las Vegas might not strike anyone as being a particularly vegetarian- or vegan-friendly city, and if your only experience with Sin City is the Strip then that's assessment enough.
Las Vegas has been a low-key plant-based paradise for a while now, but most of the dedicated vegetarian and vegan restaurants are casual cafes.
Marigold serves traditional Indian dishes, including a large selection of vegetarian and vegan dishes on its massive menu that will also satisfy meat-eaters.