Combine the passionfruit pulp, sugar and water in a small saucepan and stir to dissolve the sugar. Bring to the boil, reduce the heat and simmer for 5 minutes. Remove the pulp of the passionfruit and place in a large jug. Add orange juice, lychees and 1/2 cup syrup (from the canned lychees). Stir to combine then cover. The official website of the world famous syrup brand: MONIN.