Preheat the oven to 400ºF.
Line two baking sheets with parchment paper for easy cleanup, or leave them bare if you prefer!
Line two baking sheets with parchment paper for easy cleanup, or leave them bare if you prefer!
Roll the mixture into 24 meatballs. Arrange the meatballs on one of the lined baking sheets in rows, not touching. Drizzle the tops with olive oil.
On a second baking sheet, add the vegetables: bell pepper, zucchini, and broccoli. Drizzle lightly with olive oil and season with salt & pepper, then toss to coat. Spread the veggies out in a single layer.
Transfer both baking sheets to the oven and bake for 20 minutes or until the meatballs are cooked through & vegetables are slightly crispy. I broil the meatballs for a few minutes at the end to brown the tops a bit, but it's optional!
Meanwhile, warm the marinara sauce (if using) in a medium saucepan over low heat.
Serve the meatballs & veggies in bowls with marinara scooped over top. Enjoy!