NOTE - Sambal ulek is a hot paste made with chillies. It's used widely in Indonesian and Malaysian cuisine. It can be bought as a paste, or you can make your own by blending together hot fresh chillies (including seeds if you want it really hot) with enough water to form a paste. Then add a little salt. You can also add a little lime or lemon juice or vinegar. Alternatively you can substitute any other chilli paste, harissa, hot pepper sauce, red pepper flakes or chilli powder for Antony's pineapple sambal.