We sometimes order Asian veg (Y though) and it’s been mixed. Ironically, back in the day, wife enjoyed ex-EWR Asian veg meal better than ex-BOM. go figure.
Can’t speak to ex-DUB, but breakfast, could very well could be South Indian. Have definitely had idli/Sambar before (like a steamed rice cake in a lentil-based soup with veggies), and pongal as well. You won’t get a fresh paratha or roti like you would an a S. Asia-based carrier though.
interestingly enough, last time in P+ on PS SFO-EWR, both my wife and kids ordered Asian veg and two of them got a Thai-based curry, and the third Indian. Made absolutely zero sense to me.