Start by peeling and washing the potatoes; then drain it very well
With a thin vegetable corer, carefully carve out the middle portion of the potatoes in a way that you make sure not to puncture your potatoes
Heat the vegetable oil in a large skillet over a medium-high heat
Once hot, put the potatoes into the oil; then fry it on all the sides until you get a light golden brown color
Remove and place on clean paper towels to absorb any additional oil
Once the potatoes become cool to handle; stuff with the ground beef mixture leaving about 1/8 inch of space from the top; then top with the sliced olives
Place in one single layer in a baking tray
Use 1 tablespoon olive oil to saute the garlic
Add the tomato sauce and the water
Bring the mixture to a boil; then add in the seven spice and the cumin and turn off the heat
Pour the tomato sauce over the potatoes
Cover with aluminum foil and bake for about 50 minutes on a temperature of about 375 F
Serve and enjoy your dish!