Heat a large nonstick skillet over medium-high heat with 2 turns of the pan of EVOO, about 2 tablespoons. While the skillet heats up, chop up the cooked potatoes into bite-size chunks then add to the hot skillet and spread out in an even layer. Season them with a little salt and pepper, and let them brown for about 2 minutes without messing with them. Then give them a stir and continue to brown them for another 3-4 minutes, stirring every now and then.
Add the chopped pepper and onions, stir to combine and continue to cook for 4-5 minutes or until the veggies are tender. Add the leftover chili and cook until it is heated through.