To make Harissa, drain chiles well and chop. Combine with garlic, honey, spices, and olive oil in food processor. Pulse until smooth. Add mint and pulse to combine.
Lay lemon slices , flat side down, on a roasted dish . Season chicken well on all sides and rub with juice of 1/2 lemon. Pour harissa on both sides of chicken and lay chicken breast side up, on lemon halves. Rub harissa in well with hands to fully coat.
Roast in oven at 375 F until juice run clear and chicken is fully cooked, about 45 -50 minutes.