Black Bean Shrimp Salad with Corn & Pickled Onions

Name: Black Bean Shrimp Salad with Corn & Pickled Onions
Prep time: 25 min
Cook time: 10 min
Total time: 35 min
Yield: 4 to 6
Ingredients: For the Pickled Onions:; ¾ cup distilled white vinegar; 3 tablespoons sugar; ⅛ teaspoon salt; 1 medium red onion, thinly sliced; For the Salad:; 2 ears fresh corn; Two (15-oz) cans black beans, best quality such as Bush's or Goya, rinsed and well-drained; 3 scallions, white and green parts, thinly sliced; ⅓ cup chopped fresh cilantro, plus more for serving; ½ cup extra-virgin olive oil, divided; 2 tablespoons fresh lime juice; 2 tablespoons fresh lemon juice; ¾ teaspoon salt, divided; ½ teaspoon ground cumin; 1 pound medium shrimp, peeled and deveined, thawed if frozen; 4 cloves garlic, finely chopped; 4 oz feta cheese, crumbled; Freshly ground black pepper, for serving