Preheat the oven to 350 degrees F (175 degrees C).
Get out a baking dish and combine the Corn (1 ear), Cherry Tomato (12), Salt (1 pinch), Ground Black Pepper (1 pinch), and Olive Oil (1 dash). Stir it all together thoroughly. Let them roast in the oven for 10 minutes.
When they are done, combine them in a large bowl with White Beans (1 can), Red Kidney Beans (1 can), Black Beans (1 can), Fresh Basil Leaf (3), and juice from the Lemon (2). Toss the salad together thoroughly, then let chill for an hour at least in the refrigerator.