A time of enlightenment for a specific purpose; see “food”
Having lunch in a dream means taking a brake out of exhaustion from one’s work. (Also see Invitation)
To dream of eating lunch suggests that you shouldn’t let trivial matters interfere with your happiness or the way you pursue your goals.
Food of any kind symbolizes the intake of energy, information, power. Lunch can particularly symbolize a social occasion or a business gathering. Consider what you are eating and with whom you are dining. See Food.