THE hunger strike at Lantau Island's maximum-security Shek Pik prison was broken last night as more than 400 prisoners tucked into fried eggs, beef balls, cabbage and rice. Sources at the prison yesterday said the hunger strike was started on Thursday morning by a small group of ''trouble-makers''. More than 32 long-serving prisoners refused to eat lunch, complaining about the ''monotony'' of always eating cabbage and potatoes. By dinner an additional 30 inmates had joined the strike, followed by about 80 more on Friday morning and more than 300 others in the afternoon. The two-thirds of the prison refusing meals complained about the lack of variety in the meals brought in by an outside caterer. Officers from the Correctional Services Department (CSD) kept a close watch on the situation and said yesterday a quality review of the food may be undertaken. Sources in the prison alleged fat pork was no longer provided, but the Government insisted each prisoner was provided on a weekly basis with three lean-pork meals, one chicken meal and three beef meals. The prison says prisoners receive 450 grams of vegetables and fruit every day.