Ingredients:
1 can black beans, drained and rinsed
1 cup white corn kernels, freshly cooked is the best, but canned/frozen can work
1 red pepper, chopped
1 cup finely diced tomato
2 green onions, chopped
1 jalapeno pepper, seeded and finely chopped
2 cloves garlic, minced
2 tbsp lime juice
1 tsp salt

How to make it:
Combine all ingredients in a bowl. Taste and adjust seasoning as desired.  Refrigerate for at least an hour.  Serve with tortilla chips.  To do your own tortilla chips, just buy some good quality tortillas (try to find some with no preservatives.)  Lightly oil them, slice them into triangles and bake them for a few minutes.   As a final touch, put some sliced avocado on top of the dip when serving.  You could also sprinkle some coriander on top.