Black Bean Salad

Name: Black Bean Salad
Prep time: 30 min
Total time: 30 min
Cuisine: Mexican, TexMex
Ingredients: 3 ears fresh corn ((see note)); 2 (15-oz) cans black beans, (drained and rinsed); 2 red bell peppers, (diced); 2 cloves garlic, (minced); 2 tablespoons minced shallots, (from 1 medium shallot); 2 teaspoons salt; ¼ teaspoon cayenne pepper; 2 tablespoons sugar; 1/2 cup + 1 tablespoon extra-virgin olive oil, (best quality such as Colavita); 1 teaspoon lime zest ((be sure to zest limes before juicing them)); 1/4 cup + 2 tablespoons fresh lime juice, (from 3 limes); ½ cup chopped fresh cilantro, (plus more for garnish); 2 avocados, (chopped)