Marinated Corn Salad with Tomatoes

ears of white, yellow or bi-color corn , stripped of husks

apple cider vinegar

extra virgin olive oil

sugar , or substitute (see note)

kosher salt , or to taste

freshly cracked black pepper , or to taste

crushed red pepper flakes , or to taste, optional

chopped red onion

chopped red bell pepper

chopped fresh parsley

large tomatoes