An herb- and chile-packed chimichurri sauce makes this meat-and-potatoes main vibrant and exciting. Double the mixture, and spoon over grilled steak or fish on another night. Use your microwave to jumpstart the potatoes, then crisp them up in the drippings from the cooked chicken thighs for maximum flavor. Fresno chiles have a medium heat, just slightly more mild than a jalapeño. You can use either here, or substitute a generous pinch of crushed red pepper in the chimichurri. Skinless, boneless thighs can vary widely in size. Shop by weight rather than count, cutting larger thighs in half if needed.