Need recommendations: Authentic Udupi/South Indian restaurant near Mysore highway for 30-person group (BLR → Coorg route)

Hey folks! Looking for some local expertise here. We're a mixed group of 30 people (both NRIs and Indians) taking a private bus from Bangalore to Coorg, and want to make a lunch stop around Mysore area. What we're looking for: * Authentic Udupi-style/South Indian vegetarian food * Location: Somewhere close to the highway (minimal detour) * Timing: Need to accommodate 30 people around 2-3 PM * Must be hygienic and able to handle a large group * Bonus if they take reservations Would really appreciate recommendations from people who've done this route recently. This is for next weekend, and we want to make sure our international friends get to experience proper South Indian cuisine! TIA!