Preheat your oven to 425°F.
Chop the zucchini, red bell pepper, and broccoli into bite-sized pieces. Mince the garlic and roughly chop the fresh herbs.
In a mixing bowl, toss the vegetables with olive oil, minced garlic, salt, pepper, and chopped herbs.
Spread the vegetables evenly on a baking sheet and roast in the oven for about 20-25 minutes until tender and lightly charred.
While the vegetables roast, season the lean beef sirloin on both sides with salt, pepper, and a sprinkle of the fresh herbs.
Heat a skillet over medium-high heat. Sear the beef for 3-4 minutes on each side for medium-rare, or cook longer to desired doneness.
Once the beef is cooked, let it rest for a few minutes before slicing.
Serve the sliced beef on a plate and top with the roasted vegetables. Enjoy your balanced, delicious meal!