Fluff the rice: Rest warm cooked rice in a covered pot with 1 tsp olive oil for 5 minutes to re-steam.
Soften the onion: Toss onion with 1 tbsp lemon juice and a pinch of paprika; set aside 10 minutes.
Sizzle the beef: Heat remaining 2 tsp olive oil over medium-high. Add beef and crumble. Season with paprika, coriander, cinnamon, garlic powder, and pepper. Deglaze with ¼ cup water and cook 6–8 minutes until beef is browned and reaches 160°F/71°C.
Make the drizzle: Whisk hummus with ⅓ cup hot water and the remaining 1 tbsp lemon juice until smooth and pourable.
Prep veg: Halve tomatoes, slice cucumber, chop parsley.
Assemble: Bowl up rice, add hummus drizzle, spoon on beef, then top with tomatoes, cucumbers, olives, parsley, and feta. Finish with lemon zest and pepper.