Creating Cauliflower Cheese Lasagne is simple if you follow these steps:

1. Preheat the Oven: Preheat your oven to 400°F (200°C).
2. Prepare the Cauliflower: Toss the cauliflower florets with olive oil, salt, and pepper. Spread them on a baking sheet in a single layer.
3. Roast the Cauliflower: Roast the cauliflower in the preheated oven for 20-25 minutes, or until tender and golden brown.
4. Prepare the Béchamel Sauce: If making homemade béchamel, melt 2 tablespoons of butter in a saucepan over medium heat. Whisk in 2 tablespoons of flour, cooking for 1 minute. Gradually add 2 cups of milk while whisking until thickened. Season with salt and pepper.
5. Layer the Ingredients: In a baking dish, spread a layer of béchamel sauce on the bottom. Add half of the roasted cauliflower, followed by a layer of mozzarella cheese and a sprinkle of oregano and basil.
6. Repeat the Layers: Add another layer of béchamel sauce, the remaining cauliflower, more mozzarella cheese, and herbs. Top with any remaining béchamel sauce and sprinkle with Parmesan cheese.
7. Bake the Lasagne: Cover the dish with aluminum foil and bake in the oven for 25 minutes. Remove the foil and bake for an additional 10-15 minutes, or until the top is golden and bubbly.
8. Let It Rest: Once baked, remove the lasagne from the oven and let it rest for 10 minutes before slicing.
9. Garnish: Sprinkle fresh parsley on top for added flavor and presentation.

These steps will guide you in creating an incredible Cauliflower Cheese Lasagne that is sure to impress!