Heat the extra virgin olive oil in a large cast-iron skillet over medium-high heat.
Add the ground beef to the skillet, breaking it into small crumbles with a wooden spoon, and cook until fully browned.
Remove the beef from the skillet with a slotted spoon and set aside on a plate, leaving the remaining fat in the pan.
Add the diced red onion, chopped bell pepper, and sliced zucchini to the skillet, sautéing for 5-7 minutes until the vegetables are tender and lightly caramelized.
Stir in the minced garlic, sea salt, black pepper, smoked paprika, and dried oregano, cooking for 1 minute until highly fragrant.
Return the cooked ground beef to the skillet and toss thoroughly with the vegetables until well combined and heated through.
Serve immediately while hot, optionally garnishing with fresh parsley or a squeeze of lime.