Boil down to 1/2 volume 1 cup syrup from sliced pineapple. Stir in 1/4 cup chili sauce, 2 tablespoons sliced green onions, and 1/4 teaspoon Worcestershire sauce. Shape 1 pound hamburger into 4 triangular patties, pressing centers thin and leaving edges about 3/4 inch thick. Brown patties in broiler on one side; turn. Press in centers with spoon. Place 4 pineapple slices in broiler; baste with drippings. Just before patties and pineapple are done, place tomato wedges in patties; spoon sauce over them. Finish broiling.