1. Rinse potatoes and pat dry. Place in a large pot and fill with water to cover. Boil for 10–15 minutes or until potatoes are tender. Drain well and cool, then cube and set aside
2. Preheat oven to 350 degrees Fahrenheit (180 degrees Celsius). Combine corn kernels with a pinch of salt and a bit of black pepper on a baking sheet. Roast for 10 minutes. Remove from oven and allow to cool.
3. In a large bowl, combine potatoes, red peppers, red onion, and roasted corn.
4. In a small bowl, whisk together dressing ingredients. Pour over potato mixture. Toss gently to coat.
Cover and refrigerate for two hours before serving.