Boil or steam the corn. (I steam mine in a steamer basket for 5 minutes.) When cooked, carefully cut kernels off the cob. Dice cucumber and avocado, and halve tomatoes. Add to a bowl with the corn. Roughly chop your herb of choice (I used cilantro) and add to bowl. In a small bowl, mix dressing ingredients together and pour over salad. Toss to combine