Eating
To dream that you are eating alone signifies loss, loneliness, and depression. You may feel rejected, excluded, and cut off from social/family ties. Eating may be a replacement for companionship and provide a form of comfort. Alternatively, eating alone reflects independent needs. Also consider the phrase, "what's eating you up?" in reference to anxiety that you may be feeling. To dream that you are eating with others signifies harmony, intimacy, merriness, prosperous undertakings, personal gain, and/or joyous spirits. If you dream that you are a picky eater, then it indicates that you are holding back something. If you are currently dieting in your waking life, then the dream may serve to compensate for the sustenance that you are lacking.
Food
To see food in your dream represents physical and emotional nourishment and energies. The different types of food can symbolize a wide range of things. Generally, fruit is symbolic of sensuality, meat represents animalistic desires, and vegetables pertain to healthy pursuits. Eating certain foods also refer to qualities that you need to incorporate within your own self. To dream that you are eating specific cuisines depends on your personal associations with it. If you dream of eating a comfort food, then it indicates that you are looking for comfort in the wrong places. To eat bad-tasting food in your dream indicates some sourness or resentment in your emotional state of mind. To see or eat burnt food in your dream suggests that you are experiencing some intense emotion. The dream may also indicate that you are feeling exhausted. You are running out of fuel.