Roasted Broccoli is a big hit here, along with roasted Onions and Bell Peppers. Toss them in Olive Oil with a little salt and pepper, and I usually add Onion and Garlic powder as well.
I’d add that sliced tomatoes and cucumbers tossed with a bit of salt pepper and Italian dressing is quick, easy, and delicious. If you wanna get more into it you can make the dressing from scratch, or sub out a mustard based vinaigrette for the Italian dressing, bc it also works well.
Sliced tomatoes and cucumbers with a simple sprinkle of salt on top can't be beat