(sorry for the oh-so-fantastic pictures, my digital camera's battery is dead so I have to use my cell phone and I am by far not a pro picture taker, and then this was taken when we did the leftovers)2 cans tomato sauce
You can omit the corn and mushrooms, and even the ranch and onions but they add awesome flavor. If you don't want the tomato taste to be too sharp, add some sugar (about 3-4 Tbsp) to neutralize the acidity of the tomato sauce. Also, if you want to spice it up, try some rotel tomatoes, or you can used Italian diced tomatoes and add other seasonings. Play around with the recipe until you find what you like. I love that it can be so simple and versatile. Pretty much anything goes. Also, some shredded cheese on top would be scrumptious. Adding some zucchini or other veggies would be wonderful so when your garden is overflowing with zucchini plants, add them in (and send a few of those zucchinis my way because I love them, but have no gardening talent whatsoever) My kids wolfed this down and willingly ate it for leftovers the next two days. I had planned on freezing the rest but they loved it so much I didn't have any left to freeze.