In a large bowl, combine all ingredients. Mix well and allow to sit 1 hour before serving.
In a large bowl, lightly stir together the sweetcorn, black beans, tinned tomatoes, avocado, plum tomato, onion, jalapenos and salad dressing until well combined. Sprinkle with salt, pepper and hot pepper sauce to taste. Refrigerate until serving.
For a tasty twist on an old favourite, layer this salad on top of a baked potato with lots of Cheddar cheese!