In a small bowl, whisk together the Greek yogurt, sriracha, and water until smooth. Add a little more water if you prefer a thinner dressing.
Place the baby arugula in a shallow serving bowl as the base.
Arrange the cooked brown rice alongside the greens.
Add the sliced chicken breast.
Scatter the avocado cubes and halved grape tomatoes over the bowl.
Sprinkle with shaved Gruyère cheese.
Season lightly with kosher salt and freshly ground black pepper.
Drizzle the spicy yogurt dressing over the top.
Serve immediately and enjoy.