1. Husk corn and remove silk with a stiff brush; rinse. Cook corn in boiling, lightly salted water for 3 minutes. Remove corn; let cool. Cut corn off the cob in planks (see note).
2. Combine cooked rice, tomatoes, arugula, onion and jalape?o pepper. Transfer to serving bowl; top with corn.
3. Drizzle with vinegar and olive oil. Season to taste with salt and pepper. Serve at room temperature. Makes 10 to 12 servings.
4. Note: To cut planks, place an ear on its side on a cutting board. Holding the corn firmly with fingers away from the blade, cut off a side of the corn. Rotate and repeat until all sides are removed. Use a spatula to gently move planks to salad.