Preheat the oven to 400°F (200°C). Line a baking sheet with four sheets of aluminum foil, each about 6–8 inches square, and set aside.
In a medium bowl combine the 2 cups instant rice and 2 cups water. Let soak 5 minutes, then divide the rice and its soaking liquid evenly among the four foil sheets, placing the rice in the center of each.
Pound the chicken breasts to an even thickness with a meat tenderizer or rolling pin. Place one portion of chicken on top of the rice in each foil sheet, then add broccoli florets alongside the chicken.
Season each chicken piece with about 1 teaspoon chili powder, 1 teaspoon Italian seasoning, 1 teaspoon black pepper, and salt to taste. Drizzle about 1 tablespoon olive oil over each packet.
Fold and seal the foil packets tightly so they are fully enclosed, then place them seam-side up on the prepared baking sheet.
Bake for 40–45 minutes, until the chicken reaches an internal temperature of 165°F (74°C) and the rice is tender.
Carefully open the foil packets (watch for steam) and serve immediately.