Prepare rice according to package directions.
While rice cooks, cut steak diagonally across grain into thin slices.
Heat a large nonstick skillet coated with cooking spray over medium-high heat. Add onions and garlic; sauté 2 minutes. Add coriander, cumin, salt, and turmeric; sauté 1 minute.
Add steak; sauté 6 minutes or until done. Add tomatoes, and reduce heat to low. Cook 3 minutes or until thoroughly heated. Serve over rice.