Slice each zucchini lengthwise. Using a sharp knife cut out a rectangle deep, but not all the way through. Use a spoon to scrape out the flesh. Place the scooped out zucchini halves in a 9x13" baking dish or baking sheet, lined with foil. Chop the zucchini flesh into small pieces and set aside.

Heat the olive oil in a sauté pan on medium heat. Break open the sausage casings and crumble into the pan. Sauté until the sausage is thoroughly cooked which should take 5 or 6 minutes. Add the garlic and chopped zucchini flesh and cook for another 5 minutes until the zucchini is browned. Remove the heat.

Begin to preheat the oven to 400ºF. Distribute the sausage mixture amongst the scooped zucchini halves. Top with a layer of pasta sauce and then the cheese.

Bake the zucchini for 30-35 minutes, or until the cheese has melted and started to brown. I don't let the zucchini get too soft as I like a bit of a crunch to add another texture to your bite.