1Drain and rinse corn and beans before placing in a large bowl.
2Add pimento, green onion (and jalapeno pepper, if using) mix to combine.
3To make dressing: Whisk oil, vinegar, lime juice, garlic powder, cumin, sugar, chili powder and salt in a bowl. Add hot sauce to dressing if you want it a little more spiciness. Use as much of this dressing on the salad as desired. I usually start with half of the dressing. Then add more if needed.
4Cover the salad and chill 24 hours mixing once or twice during chilling.
5When ready to serve, add tomatoes and stir to combine.