Combine sugar and 1 cup water in a medium saucepan. Cook over medium heat for 10 minutes, or until the sugar is caramelized. Stir in the sesame seeds, cinnamon, cloves, and lemon juice, and cook for 3 minutes. Remove from heat.

Pour the sesame mixture onto a wet, smooth work surface, or onto a greased baking sheet. Spread out to a thickness of 1 inch. Using a sharp knife, cut the mixture into diamond shapes or let it harden and then break into chunks.