Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Dice the zucchini, red bell pepper, and red onion into uniform half-inch pieces.
Spread the vegetables on the baking sheet and toss with 0.5 tablespoons of olive oil, sea salt, and black pepper.
Roast for 18-20 minutes until the vegetables are tender and have developed golden brown edges.
While the vegetables roast, heat the remaining 0.5 tablespoons of olive oil in a large skillet over medium-high heat.
Add the minced beef to the skillet, breaking it into small crumbles with a wooden spoon, and cook until fully browned.
Stir in the minced garlic, tomato paste, and dried oregano, cooking for an additional 2 minutes until fragrant.
Remove the roasted vegetables from the oven and fold them directly into the skillet with the beef to combine.
Serve the mixture warm, ensuring each portion is well-coated in the savory pan glaze.