Gordon Ramsay’s Pickled Onions require red onions, white vinegar, water, cane sugar, sea salt, and optional garlic cloves with mixed peppercorns. Ready in 25 minutes, this recipe serves 8.
Thinly slice the onions and divide them between jars.
Add garlic and peppercorns to each jar, if using.
Heat the vinegar, water, sugar, and salt in a saucepan until dissolved. Let cool and pour over the onions.
Let the onions cool to room temperature, then store in the fridge.
Pickled onions will be ready in about 1 hour for very thinly sliced onions or overnight for thicker sliced onions. They will keep in the fridge for up to 2 weeks.