Here are several hotels in/around Bentota that have on‑site restaurants (beachfront and town options, from luxury to mid‑range). I’ve listed the main dining outlets or the fact they offer on‑site restaurants and cited each source.

• Taj Bentota Resort & Spa — multiple on‑site restaurants (The Palms all‑day, S.H.A.C.K seafood, Oriental Pavilion Chinese, Tease bar/lounge). (tajhotels.com)
• Cinnamon Bentota Beach — several signature restaurants (Nossa all‑day, Zest (Asian), Ottimo (Italian), Sea Meets Spice beachfront seafood). (cinnamonhotels.com)
• Jetwing Saman Villas (Induruwa, near Bentota) — boutique luxury hotel with a main restaurant and several private/romantic dining options (rock/sea/pool dining). (jetwinghotels.com)
• Centara Ceysands Resort & Spa (formerly NH Bentota Ceysands) — all‑day dining Café Bem plus other on‑site restaurants and bars. (prod.centarahotelsresorts.com)
• Taru Villas — The Long House — beachfront boutique property with an on‑site restaurant/pool‑side dining and curated menus. (taruvillas.com)
• Pandanus Beach Resort & Spa — beachfront resort with two on‑site restaurants (Ocean and Golden Sands) serving breakfast/lunch/dinner. (booking.com)
• EKHO Surf (Bentota) — main restaurant L’héritage plus a seafood beach bar/restaurant (Tuna Turner) and bars/café. (ekhohotels.com)
• Temple Tree Resort & Spa — beachfront resort with an on‑site restaurant serving breakfast/lunch/dinner (international/local cuisine). (booking.com)
• Wunderbar Beach Hotel — small beachfront hotel with the Wunderbar Beach Restaurant on site. (booking.com)

If you want, I can:

• Filter these by budget, distance from Bentota town, or cuisine type; or
• Check current availability/rates for specific dates (I can look that up).