Corn Chowder Salad

2 teaspoons olive oil 3 slices bacon (about 2 ounces), cut crosswise into 1/2-inch pieces 1 Yukon gold or other waxy potato (about 8 ounces), peeled and cut into 1/2-inch dice 1 red bell pepper, cut into 1/2-inch dice Salt 6 ears corn, kernels scraped from the cob with a knife (about 3 cups) 2 tablespoons cider or rice vinegar 1 small red onion, halved and thinly sliced Red pepper flakes