Preheat your oven to 425°F for roasting the vegetables.
Dice the bell pepper, zucchini, and red onion into bite-sized pieces. Toss them lightly with olive oil, garlic powder, thyme, rosemary, salt, and pepper.
Spread the vegetables on a baking sheet and roast for about 15-20 minutes, until tender and slightly caramelized.
While the vegetables are roasting, heat a skillet over medium-high heat. Add the lean ground beef, breaking it up as it cooks.
Season the beef with salt and pepper, and once mostly browned, create a small well in the center of the skillet.
Crack the egg into the well and let it cook until the whites set, stirring gently around the edges if desired to mix slightly with the beef.
Once the beef is fully cooked and the egg is done to your liking, fold in the roasted vegetables and combine all ingredients.
Taste and adjust seasonings if needed, then serve warm.