Heat the olive oil in a large skillet over medium-high heat until shimmering.
Add the ground beef to the skillet, breaking it apart with a wooden spoon or spatula, and cook until fully browned.
Drain any excess fat from the pan if necessary, then add the diced yellow onion and red bell pepper.
Sauté the mixture for 4 to 5 minutes until the onions are translucent and the peppers begin to soften.
Stir in the diced zucchini and minced garlic, then season with sea salt, black pepper, smoked paprika, and dried oregano.
Continue cooking for another 5 to 6 minutes, stirring occasionally, until the zucchini is tender-crisp.
Remove from heat and serve immediately while the vegetables are bright and the beef is juicy.