Gather the ingredients.
Core and seed the bell peppers.
Cut the peppers lengthwise into ½-inch slices.
In a large skillet, heat the olive oil over medium heat.
When the oil is very hot, add the sliced peppers.
Sauté the peppers for 5 to 7 minutes, until they are tender but still firm.
Stir in the balsamic vinegar , pepper, and salt.
Cook for an additional minute, sautéing to coat the peppers with the vinegar.
Transfer the peppers and sauce to a dish and serve hot.
