In a large skillet, heat the olive oil over medium heat. Add the diced onion and sauté for about 3-4 minutes until translucent.

Add the minced garlic and cook for an additional 1 minute until fragrant.

Increase the heat to medium-high and add the ground beef. Cook until browned, breaking it apart with a spatula, about 5-7 minutes. Drain excess fat if necessary.

Stir in the diced red bell pepper and sliced zucchini. Cook for another 5 minutes until the vegetables are tender.

Add the halved cherry tomatoes, dried oregano, dried basil, salt, and pepper. Cook for an additional 2-3 minutes until the tomatoes start to soften.

Remove from heat and sprinkle the crumbled feta cheese on top. Garnish with fresh parsley before serving.