Take the grape leaves out of the cold water. When rolling the grape leaves, use scissors to cut the stem off the grape leaf. Lay the grape leaf flat on a baking sheet. Take about about one teaspoons of the filling mixture and form it into a cylinder shape into the middle of the leaf. Bring the left and right side of the leaf into the middle and roll from the bottom to the top tightly, but not too tightly. If you did it correctly, it should look like a cigar. Continue to roll grape leaves until you run out of the filling.
Gently lay most of the rolled grape leaves over the potatoes, reserving ¼ of them for the second layer. Place the sliced tomatoes over the rolled grape leaves. After the sliced tomato layer, gently lay the rest of the grape leaves on top.
Take the excess liquid we drained off from the filling and in the same bowl, whisk in some olive oil, salt, black pepper, seven spice, lemon juice, and water. Taste and adjust to your liking. This will become our broth for the dish.