Pork with fruit

1 lb Italian plums or 1 lb black plums (4-6 plums) or 1 lb red plum , pitted and cut into sixths (4-6 plums) 2 sprigs fresh rosemary , plus more for garnish[...]

2 (1 lb) pork tenderloin 1 teaspoon salt 1 teaspoon fresh coarse ground black pepper 1 teaspoon ground allspice 1/4 cup butter or 1/4 cup margarine , divided[...]

1 pound pork tenderloin trimmed 1/2 teaspoon salt divided 1 x black pepper freshly ground t taste * 3 tablespoons apricot preserves divided 4 each nectarines[...]