Preheat your oven to 400°F (200°C).
Chop the zucchini, red bell pepper, cherry tomatoes, and red onion into bite-sized pieces. Mince the garlic.
In a bowl, toss the chopped vegetables with olive oil, a pinch of salt, pepper, and the leaves stripped from the rosemary and thyme sprigs.
Spread the vegetables on a baking sheet and roast in the preheated oven for 20-25 minutes until tender and slightly caramelized.
While the vegetables are roasting, heat a skillet over medium-high heat. Add the lean ground beef and cook until browned and crumbled, about 5-7 minutes. Season with a pinch of salt and pepper.
Lower the heat and pour in the egg whites into the skillet with the beef, stirring continuously until the eggs are softly scrambled and well incorporated.
Once the vegetables are roasted, gently fold them into the beef and egg mixture. Adjust seasoning if necessary.
Serve warm, garnished with any remaining fresh herb leaves.