Dice sweet potatoes into 3/4-1-inch cubes. Toss with olive oil, salt, and pepper. Transfer to a baking sheet and roast for 25-30 minutes, until fork tender. Remove from the oven and let cool
Add 1 1/2 tablespoons olive oil to a skillet over medium heat. Once the pan is heated, add the corn and cook, stirring frequently for 7-8 minutes. Remove from the heat and let cool.
While the potatoes and corn are cooling, whisk together the dressing ingredients.
Add greens to a large salad bowl with blueberries, corn and the dressing, and toss well. Gently toss in sweet potatoes, cheese, and pumpkin seeds. Toss just to coat.