HAM, AVOCADO AND ROASTED TOMATO TOAST

4 large egg tomatoes
1 tablespoon brown sugar
1 small red onion, sliced thinly
150 g shaved leg ham
4 thick slices vienna loaf
1/2 small avocado, sliced thinly
1 tablespoon shredded fresh basil leaves

Cut tomatoes in half lengthways; place cut-side up on oiled oven tray, sprinkle with sugar. Bake tomato, uncovered, in very hot oven 15 minutes. Add onion; bake further 15 minutes or until tomato is soft.