Marinate the chicken pieces with ¾ cup to 1 cup of the chimichurri sauce, save the additional sauce for basting and serving. You can marinate the chicken several hours in advance if you have time, and if not just rub the sauce over the chicken pieces right before baking.
Pre-heat the oven to 400F.
Arrange the chicken pieces on a baking pan lined with parchment paper. You can also add potatoes or other vegetables (rubbed with chimichurri sauce).
Bake the chicken pieces for about 30 minutes, then turn the chicken pieces and vegetables over. Baste the chicken with some of the reserved chimichurri sauce.
Continue baking for another 25-30 minutes or until the chicken is browned and fully cooked. Exact time will vary based on your oven and the thickness of the individual chicken pieces.
Brush the additional chimichurri sauce when done and serve immediately.