This is one of my favorite dishes to make when I don't have time to go to the grocery store, because I nearly always have everything I need on-hand. It helps that there are so many healthy veggies built right into the dish, so there's no need to plan any sides to go with it.
This is one of those dishes where I recommend using frozen vegetables. Not only does that cut down on your grocery shopping, but it really doesn't make a difference in the final dish. In fact, frozen will often have better flavor, as vegetables are frozen at the very peak of freshness. I also love that you don't have to defrost them before using them, making this pasta bake even easier.