I made this stuff the other night.. was pretty easy, not too spendy and mighty tasty..
you need a pound of italian sausage, ordinary or turkey, 2 smallish zucchinis, 1 yellow squash, 1 onion and 1 14oz can of diced tomatoes, a bit of garlic powder and italian seasoning (or basil and oregano).
brown the sausages whole then slice them in 1/4" slices and put them back in the pan and brown them some more. slice up the squashes, chop the onion, and add them all to the pot, cook them for a couple minutes, then pour in the tomatoes and add the spices, cover and simmer for 15 minutes or so. serve it over rice. that ought to cost less than 10 dollars, maybe significantly less depending on what's on sale.. and ought to feed you 5 or 6 times.