Bring a large pot of water to the boil and cook corn on the cob for 3-5 minutes. Drain corn, run under cold water to stop cooking further. Once cool to touch, cut corn off the cob. Cool.

Combine the corn, avocado, tomatoes and onion. In a large glass bowl, mix together the dressing ingredients in a glass bowl. drizzle over lime juice, olive oil and a good pinch of salt and pepper. toss gently to mix.