Preheat your oven to 400°F..
Cut the potatoes into 1-inch pieces.
Remove the stem, seeds, and ribs from the bell pepper, then cut it into 1/2-inch slices.
In a medium bowl, toss the vegetables with 1 teaspoon of olive oil, 1/4 teaspoon of salt, and a pinch of pepper.
Add the bell peppers and potatoes on a foil-lined baking sheet into one even layer with plenty of space around each piece.
Slide the pan into the preheated oven.
Roast until the vegetables are tender and slightly caramelized, about 30-35 minutes.
Carefully remove the baking sheet from the oven.
Serve warm as a side dish or enjoy as a light meal.