Mix the olive oil, ginger and garlic, and stir well. Rub the mixture in the chicken portions. Season with salt and pepper. Leave at room temperature for about 15 min. Heat the grill. Mix the jam and the juice. Roast the chicken at medium heat. It will take about 25 to 30 min. The last 15 min coat with jam and turn the chicken over more often. Bake the orange pieces for about 8 min and serve over the pieces of chicken.