In a food processor, combine the roasted red peppers, garlic, peppers, oil, dried mint, paprika, cayenne, honey, tomato paste and 2 teaspoons of salt. Process until smooth.
Measure 3 tablespoons of the puree into a small bowl, then stir in the lemon juice. Cover and refrigerate.
Transfer the remaining puree to a medium sized bowl, add the chicken and toss to coat. Cover and refrigerate for at least 1 hour.
Prepare the barbecue, by turning the elements to high and leaving to warm for 7-10 minutes. Clean the grate and remove the reserved puree from the fridge.
While the grill heats, thread the chicken along 8 kebab skewers. Turn all barbecue burners to medium-high heat. Place the skewers on the grill and cook uncovered for 2-3 minutes, until evenly charged on both sides, 10 to 12 minutes total.
Transfer to a serving platter. Stir the fresh mint into the reserved puree and serve with the hot kebabs.