Roast the Sweet Potatoes: Heat oven to 425°F (220°C). Peel and dice 1½ pounds sweet potatoes, then toss with a drizzled of olive oil, a pinch of salt, and pepper. Roast for 20 - 25 minutes until golden and fork tender.
Make the Dressing: In a medium bowl, whisk 4 tablespoons extra virgin olive oil, 2 tablespoons lemon juice, 2 tablespoons mustard, 1 tablespoon honey, 1 teaspoon dried oregano, ½ teaspoon salt, and pepper until smooth and creamy.
Marinate the Chickpeas: Drain and rinse 1 can chickpeas, shake off water, then stir into the dressing. Let sit while you prep the veggies.
Add Veggies and Toss: In a large bowl, add 1 cup corn, 1 cup green bell pepper (diced), ½ red onion (chopped), and 4 ounces crumbled feta. Add the roasted sweet potatoes, chickpeas and dressing, then toss gently to combine. Serve warm or chilled.
