There are many delicious foods in Kuala Lumpur, and the most popular chicken dish is "Hainan Chicken Rice". Hainan chicken rice is a traditional Malaysian cuisine, with chicken, rice and seasonings as the main raw materials. In Kuala Lumpur, you can find many places to serve delicious Hainan chicken rice. Here are some recommended restaurants:

1. Mong Kok Tea Restaurant: Located in the center of Kuala Lumpur, Mong Kok Tea Restaurant is a famous Hainan chicken rice restaurant, offering delicious Hainan chicken rice and various authentic Malaysian cuisines.

2. Malaysia Food Street: Malaysia Food Street is located in the center of Kuala Lumpur, where many traditional Malaysian food stalls gather, including Hainan chicken rice.

3. PenangFoodCourt: The Penang Food Court in downtown Kuala Lumpur is a gathering place for many traditional Malaysian food stalls, including Hainan chicken rice.

4. No.10 Hutong (Lorong 10): No.10 Hutong is located in the center of Kuala Lumpur, where many traditional Malaysian food stalls gather, including Hainan chicken rice.

These are some restaurants that serve delicious Hainan chicken rice. Of course, there are many other gourmet restaurants and food stalls in Kuala Lumpur. You can choose according to your taste and budget.