In a bowl, toss shrimp with curry powder and cinnamon. Set aside.
Heat 1 TBS olive oil in large skillet over medium-high heat. Add scallions and sauté for 1 minute. Add mushrooms, water chestnuts and 1/4 cup cilantro. Sauté until mushrooms are tender, then transfer to a plate.
Using the same skillet, add the remaining 1 TBS olive oil and sauté the shrimp for 1 to 2 minutes. Add the chicken broth slowly, stirring constantly. Return the sautéed mushrooms and water chestnuts to the skillet, then season with salt and pepper to taste. Cook for 3 to 5 minutes. Turn off the heat and add the yogurt slowly, stirring constantly. Serve immediately over rice. Garnish with cashews and 1/4 cup chopped cilantro.
