Shred a small yellow onion or 1/4 of a large onion in a food processor or using a food grater
Add all stuffing ingredients to a bowl and stir until combined
Prepare the zucchini. Cut the top and bottom of the zucchini evenly to allow the zucchini to stand in the pot. Cut the zucchini in half, do not cut vertically, but cut horizontally to allow you to core the zucchini. Core the zucchini, but do not go all the way through to the bottom. You want to leave the bottom of the zucchini to contain the stuffing. Poke small holes in the zucchini to allow broth the help cook the stuffing
Fill the zucchini 3/4 of the way to the top with the ground beef mixture.
Sprinkle olive oil at the bottom of a deep pot. Place stuffed zucchini upright with stuffing on top