When a man is separated from his love either by distance or break-up. The man heart is so lonely and whilst thinking of his love, a tear or two comes to his eyes.
The Greek man was pining for his beloved Pakistani girl. His random thoughts of her (stroking her hair, looking in her big brown eyes) would bring him to a place of utter contentment.
When a man, specifically a Greek man is eating a home cooked meal and says "Not bad."
What he really means is that the meal is to his liking and he is satisfied.
"How is the lasagna Doctor?" asked the Paki girl. With his lips full of tomatoe sauce the Doctor replies "Not bad."