Step 1

Thinly slice half the chillies. Remove and discard seeds from remaining chillies. Thinly slice. Combine chilli, onion, ginger, sugar, lemon juice, vinegar and salt in a microwave-safe bowl.

Step 2

Microwave, uncovered, on high (100%) for 1 minute 30 seconds. Stir. Microwave for 1 minute 30 seconds or until sugar has dissolved.

Step 3

Microwave, uncovered, on high (100%) for 20 minutes, stirring every 5 minutes, or until mixture has thickened. Set aside for 2 minutes for bubbles to subside. Carefully spoon into a hot sterilised jar (see note). Seal. Cool. Refrigerate for up to 1 month.