Cowboy Caviar (Texas Caviar Dip)

Name: Cowboy Caviar (Texas Caviar Dip)
Prep time: 15 min
Cook time: 5 min
Total time: 20 min
Cuisine: American
Ingredients: 1/2 cup olive oil; 1/4 cup granulated sugar (or to taste (reduce or omit if desired)); 1/4 cup white wine vinegar; 1 teaspoon chili powder; salt; 1 pound Roma tomatoes (seeded and diced); 1 (15-ounce) can black-eyed peas (drained and rinsed); 1 (15-ounce) can black beans (drained and rinsed); 1 (11-ounce) can sweet corn (drained); 1 red onion (peeled and diced); 1 green bell pepper (stemmed, seeded, and diced); 1 red bell pepper (stemmed, seeded, and diced); 1 cup chopped fresh cilantro (or fresh parsley, from 1 bunch)