Cut the onion brunoise and the bacon into small pieces.
Sauté the bacon until crispy.
Add the onion until golden.
Add the spinach and cook for about 1 minute.
Let cool and mix with the ricotta.
Roll up the crepes with the ricotta mix.
In a baking dish put a little béchamel base.
Put the cannelloni next to each other and cover with the rest of the béchamel.
Add a little tomato sauce on top of each one.
Cover with very finely grated Parmesan cheese to gratin.
Bake at 180°c for 10 or 15 minutes and then oven very high (Approx 220°c) until the cheese is gratin for a few more minutes.
Enjoy!