Preheat the oven to 425 degrees F (220 degrees C). Line a 10x15-inch baking pan with aluminum foil.
Arrange chicken, potatoes, and cherry tomatoes in a single layer on the prepared pan. Drizzle with oil and sprinkle with salt and pepper.
Roast in the preheated oven until vegetables are tender and chicken is no longer pink in the center and the juices run clear, 20 to 30 minutes. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).
Serve with pesto and garnish with basil.
