Combine cumin, turmeric, salt, pepper, and yogurt in a bowl. Add beef and toss to combine.
Heat oil in a skillet over medium heat.
Sauté beef, then add marinade and simmer for 10 minutes or until sauce is reduced by half.
Get rice ready in a serving bowl.
Top with cucumber, tomatoes, and onions.
Arrange beef on top of vegetables.
Drizzle with remaining sauce.
Serve immediately.