Preheat grill to medium heat and lightly oil the grates.
In a bowl, toss the mini sweet peppers with the extra virgin olive oil and sprinkle with salt and black pepper.
Skewer the mini sweet peppers crosswise.
When the grill is at medium heat, arrange the skewered mini sweet peppers directly onto the grill grate. Grill them until blistering and brown on some spots, about 4 minutes per side.