I like spaghetti squash with anything I used to put on pasta: butter and parmesan cheese, a creamy garlic sauce, pesto (easy to make, but also fine jarred), or any sauce you might have put on pasta - just try to avoid added sugar/starches. I often have it with a chunky meat sauce to make it a whole meal.

I like bagged cole slaw mix for something different in the salad department. You can put on any dressing that you like. A bonus is that you can also cook with it. Cook up some bacon and onions, then stir that stuff in and sautee it. YUM. Fast comfort food.

As for cooked veggies, my favorite easy ones are frozen veg mixes that I can nuke. There are lots of combinations, and some of them are meant for stir-fries so they're quite flavourful even if you just put some butter, salt and pepper on them.

Have fun.