Heat the olive oil in a large skillet over medium heat. Add the diced onion and cook for 2-3 minutes until softened and fragrant. Stir in the minced garlic and let it bloom for 30 seconds.
Add the ground beef to the skillet. Break it apart with your spoon and cook until browned and no longer pink, about 5-7 minutes. Drain any excess fat if necessary.
Toss in the bell pepper, zucchini, and cherry tomatoes. Stir well and let them cook for about 5 minutes, or until they start to soften but still hold their shape.
Sprinkle in the oregano, cumin, smoked paprika, salt, and pepper. Stir to combine, letting the spices mingle with the beef and veggies.
Stir in the sliced Kalamata olives and let everything warm through for another 2 minutes.
Remove from heat. Sprinkle crumbled feta cheese over the top and garnish with chopped parsley. Serve immediately and enjoy!
Find it online: https://www.homeydishes.com/mediterranean-ground-beef-stir-fry/