On Tuesday Sam Cassell and Kendrick Perkins will serve 250 turkey dinners at the Walter Denney Youth Center in Dorchester. Full dinners, including a choice of turkey or ham, mashed potatoes, stuffing, Smart Water, and Vitamin Water, will be provided by the Sam Cassell Foundation and Mark Wahlberg Foundation. Today Ray Allen will provide 275 dinners at the Vine Street Community Center as part of his Ray of Hope Foundation.