Al-Rahaman
101, 101/1 99 Saphan Yao Alley, Si Phraya, Bang Rak, Bangkok 10500
Lead with the butter chicken and a basket of naan; the kitchen is set up to do North Indian classics well, and the Bangladeshi side of the menu is the deeper cut to explore on a second visit. Come with cash and patience for the alley walk-in. The address looks awkward on a map but the lane is a 4-minute walk from the main road.
You turn into Saphan Yao Alley off Si Phraya Road and the restaurant front opens out at number 101. The signage is bilingual. The room itself is plain, the tables are close, and the focus sits squarely on the food coming out of the open tandoor station at the back.
The kitchen runs two cuisines in parallel. The Indian side covers the familiar map: butter chicken, biryanis built on long-grain basmati, a full range of curries, and naan pulled to order from the clay oven. The Bangladeshi side is where the menu gets distinctive for Bangkok, with the fish and mustard-oil preparations that you rarely find west of Phra Khanong.
Plates sit between 200 and 300 baht, which is generous for the portion sizes that arrive. The restaurant is halal and operates a strict no-alcohol policy, so the table fills with mango lassi, sweet lassi, and masala chai instead.
Dining options include pickup, delivery, and table reservations through the restaurant's Facebook page. The phone number listed for direct bookings is +66 85 140 1440.
Come with at least one other person so you can order across the menu. A single biryani fills a plate but does not let you taste the curry side of the kitchen, and the curry side is where this restaurant earns the repeat visits. If you have the choice between a Friday lunch and a Sunday dinner, take Friday: the post-prayer crowd from the nearby community brings the room to life and the kitchen runs at its sharpest.