2
Slice zucchini lengthwise.
3
In a large pan over medium-high heat, cook and break up ground beef thoroughly.
4
Pour 2.5 cups of sauce into pan, stir to combine, and turn off heat.
5
In a bowl, mix ricotta, parmesan, egg, salt, and pepper.
6
In a 9x13-inch baking dish, spread 1/2-cup pasta sauce, then top with zucchini slices, then top with beef-sauce mixture, and evenly spread ricotta on top. Repeat this layering.
7
Finally, top with one last layer of zucchini and mozzarella cheese.
9
Allow to cool. Store in fridge until ready to serve.