30-Minute Creamy Chicken, Corn and Tomato Skillet

Ingredients

• 4 chicken breasts
• Kosher salt and freshly ground black pepper
• 1 tablespoon extra-virgin olive oil
• 2 tablespoons unsalted butter
• 1 sweet onion, halved and thinly sliced
• 2 pints cherry tomatoes
• 2½ cups fresh corn kernels
• ⅓ cup heavy cream
• ½ teaspoon crushed red-pepper flakes, or more to taste
• ⅓ cup basil leaves, roughly chopped