Pre-heat oven to 350°F.
If your lasagna sheets are very large you can cut them in half.
Sheets about 6 × 6-inches is about right but you can make almost any size work.
If the sheets are too stiff, just soak them in warm water for a few minutes until they soften sufficiently to roll.
You will need two 8 x 8-inch baking dishes, or a large baking dish of the equivalent size.
Spoon a thin layer of the sauce to cover the bottom of the pans.
Spoon 1/8 of the filling onto each lasagna sheet and gently roll the sheet up into a tube about an inch thick.
I find spooning the filling onto the center of the sheet and then rolling works best.
As you roll, the filling disperses throughout the pasta tube you are forming.
Place the cannelloni in the pan and cover with the remaining sauce, a layer of basil leaves and then sprinkle on the grated mozzarella evenly.
Bake for about 40 minutes until the sauce bubbles and the cheese is melted and begins to brown.