Place pork in a medium bowl and pour charmoula dressing over the top. Fold to incorporate. Cover and let marinate in the refrigerator for 6 hours or overnight.
Place red pepper, green pepper, and onion in a medium bowl. Drizzle with olive oil and fold to coat evenly.
Thread the marinated pork, peppers, and onions onto skewers. Sprinkle with a bit of salt and freshly ground black pepper on all sides, to taste.
Heat grill to medium-high. Make sure grates are scrubbed clean and then oiled (see Notes).
Place kabobs on hot grill grates. Grill for 10-12 minutes total, turning every few minutes, until pork reaches 145°F with an instant-read thermometer. Total time will depend on grill temperature and size of pork pieces.
Remove kabobs from the grill to a serving platter, and let rest for 3 minutes. Sprinkle with optional chopped cilantro and serve with yogurt mint sauce.
In a medium bowl, stir together all ingredients. This can be made up to a day in advance, stored covered in the refrigerator until ready to use.
