PREHEAT oven to 350° F. Lightly grease 2-quart casserole dish.
BRING water and bouillon to a boil in medium saucepan. Add rice and butter; cover. Reduce heat to low; cook for 15 to 20 minutes or until rice is almost tender and most of liquid is absorbed.
COMBINE prepared rice, chicken, cheese, evaporated milk, onion, eggs and cilantro in prepared casserole; stir well.
BAKE for 40 to 45 minutes or until bubbly and edges are golden.