I had a recipe for this, but somehow the ingredients didn't seem to make it to my list, so I did some ad-libbing from the freezer.
Just took a variety of frozen veggies (I think I had broccoli, asparagus, peas and corn) and added them in.
Then - I didn't have chicken gravy but I did have mushroom gravy so I added some canned mushrooms (I know I'm evil for not using fresh, but on crock pot days, which are busy days, anything goes).
Doesn't it look pretty all mixed together:)
The recipe called for boxed mashed potatoes but I did decide to go fresh with this, just chopped some red potatoes, boiled them, added some nonfat yogurt (instead of sour cream), seasoned, mashed, and there you go.