Slice zucchini in a food processor. If necessary, cut zucchini in half lengthwise so each half fits into the feed tube. Slice as much as you need to make four cups of zucchini.
2
Place the zucchini in a large bowl and set it aside. Chop the onion in the food processor until chopped fine. Add that to the zucchini.
3
Combine remaining ingredients in the food processor and combine until a thick sauce forms. Scoop contents of the food processor onto the zucchini and onion.
4
Mix to combine all ingredients; pour into a pie plate or Pyrex dish prepared with cooking spray and put it into an oven preheated to 375 degrees. Cook for 45 minutes or until golden brown on the top.