01 -
Warm the sausage meat over gentle heat in a frying pan until cooked. Drain any extra juices through a colander and set it aside.
02 -
Slice the zucchini into thin rounds. Trim the lasagna sheets into approximately three strips each to fit your baking dish.
03 -
Chop up the onion and garlic. Heat them in a pot with olive oil till softened. Then mix in the tomato paste, the canned tomatoes, water, Provencal herbs, a pinch of sugar, plus your preferred amount of salt and pepper. Let it simmer quietly for 10 minutes.
04 -
Combine the milk, thick cream, and mustard together in a bowl. Add some salt and pepper.
05 -
Turn on the oven to 180°C (fan setting). Start your lasagna layers by spreading some tomato sauce at the bottom of a deep baking dish. Keep layering in an alternating pattern: lasagna sheets, zucchini, meat, mustard sauce. Finish the top with a layer of sheets, cover with some shredded cheese and the last of the tomato sauce. Sprinkle on Parmesan. Cover it with foil and bake for 50 minutes. For the last 10 minutes, grill it uncovered to brown the top.