Quick vegetable pickle | Australian Onions

Ingredients

• 1 red or brown onion, thinly sliced
• ½ cup red radish, thinly sliced
• ½ cup small cucumbers, thinly sliced
• ½ cup carrot, thinly sliced
• ½ cup red cabbage, thinly sliced
• 1 tbsp fresh dill, roughly chopped
• 1 tsp mustard seeds
• 1 cup apple cider vinegar
• 1 cup water
• 1 tbsp caster sugar
• 2 tbsp sea salt