Mr Driver took us to this restaurant in Ayutthaya, Ruean Rojjana Thai Restaurants.
Adress:
11/3 ถนนมหาราช ตำบล ประตูชัย อำเภอพระนครศรีอยุธยา จังหวัด อยุธยา
22/3 Maharat Rd., T.Pratuchai, A.Phranaknonsri Ayutthaya
Phone: (+66)035-323-765
Open daily from 10:00 to 21:00.
Located near Ayutthaya Historical Park.
For further information, see this website:
– http://www.rueanrojjana.com/contactus.html
– http://www.ayutthayarestaurant.com/
We order this meal for lunch (The price was based on time where I eat, maybe when you get there, there’s a change of price, just showing you the approximately price):
Spicy Chicken Soup with Coconut Milk and Young Galangal
S = 140 Baht
L = 200 Baht
Fried Morning Glory (120 Baht) 
Glass Noodle Soup and Mince Pork
S = 140 Baht
L = 200 Baht
Deep Fried Minced Shrimp served with sweet Plum Sauce (160 Baht)
— This is delicious, we order 2 portion and still not enough —
Cheerful Traveller's Diary 