Preheat the oven to 400 F and line a large baking sheet with parchment paper.

Wash the zucchini well and slice off the ends. Slice the zucchini in 1/4" sliced (you should have about 20-24 slices).

Add the zucchini to the baking sheet and top each zucchini slice with a large spoonful of sauce. Cover the sauce with a sprinkle of mozzarella cheese. Finally, top with 2-3 slices of beef slices.

Transfer to the oven and bake for 8-10 minutes or until the cheese is fully melted.

Serve topped with chopped parsley.