Fresh Black Bean Shrimp Salad with Corn and Pickled Onions - ioanacooks

Ingredients

• 3/4 cup distilled white vinegar
• 3 tablespoons sugar
• 1/8 teaspoon salt
• 1 medium red onion, thinly sliced
• 2 ears fresh corn
• 2 cans (15 oz each) black beans, rinsed and drained
• 3 scallions, thinly sliced
• 1/3 cup chopped fresh cilantro, plus more for serving
• 1/2 cup extra-virgin olive oil, divided
• 2 tablespoons fresh lime juice
• 2 tablespoons fresh lemon juice
• 3/4 teaspoon salt, divided
• 1/2 teaspoon ground cumin
• 1 pound medium shrimp, peeled and deveined, thawed if frozen
• 4 cloves garlic, finely chopped
• 4 ounces feta cheese, crumbled
• Freshly ground black pepper, for serving