Is it a tortellini recipe, or a lasagne? It is up to you to decide, but this vegetarian yellow-green tortellini lasagne is really great, surprising and easy. I used tortellini for this delicious oven dish, but ordered them in layers, like you would do with lasagne. The green layers consist of a broccoli-spinach mixture with some green peas. The yellow part of the dish is a béchamel sauce, seasoned with turmeric.