Chicken With Indian-Spiced Tomato Sauce

I found this recipe in Fast, Easy, Fresh by Barbara Fairchild. She says that this is like chicken tikka masala. I hope it is, since I haven't tried it.

• Ready In: 55 mins
• Serves: 8

Ingredients

• 2  boneless skinless chicken breast halves, cut into 2-inch pieces
• 1⁄4 cup fresh lemon juice
• 1⁄2 teaspoon turmeric
• 2  tablespoons  vegetable oil
• 1  large onion, chopped
• 1  tablespoon  minced peeled fresh ginger
• 1⁄2 teaspoon cumin seed
• 1 (14 1/2ounce) can diced tomatoes with juice
• 1 1⁄4 teaspoons chili powder
• 2  tablespoons sour cream

Directions

1. Combine chicken, lemon juice, and turmeric in medium bowl. Toss to coat. Marinate 30 minutes.
2. Heat oil in large skillet over medium heat. Add onion, ginger, and cumin seems; saute until most of marinade evaporates, about 3 minutes.
3. Add chicken with marinade; saute until most of marinade evaporates, about 3 minutes.
4. Add tomatoes with juice and chili powder.
5. Simmer uncovered until chicken is cooked through and sauce thickens, about 10 minutes.
6. Season to taste with salt and pepper.
7. Remove from heat.
8. Mix in sour cream.