When you are eating some kind of the meal in your dream, then such dream signifies the hunger for love, affection or sympathy. The dream could also foretell about your actual hunger, because you went to bed with an empty stomach. For some people the very low blood sugar is being felt during the sleep. The lunch in dreams could also represent the fact that you are trying to eat your problems, because some people when they feel stressful, they eat lots of food. The dream in which you are preparing the lunch for other people shows the welcoming personality you have and tend to look after the others.
Read more about dreaming of Lunch in other dream meanings interpretations.