You can make this a hearty meat celebration, heavy with veggies or just a cleansing of the pantry dish. All of my measurements are "ish" meaning they are close to what is listed but nothing is critical so you can cut back on what you don't like and add more of what you do like. Let's just say, "Prepare to taste."
You can replace all the veggies or most of them with frozen mixed vegetables (I do not recommend canned mixed vegetables for anything that a human would be expected to eat).
I would suggest a mixture of leftover cheese. You can put bits and pieces of cheese in a ziploc freezer bag, and add bits to it instead of them going bad in the refrig. I think IIRC that Julia Child did this. Good for Mac and Cheese and anytime you need cheese for most any casserole!