Clean broccoli and cauliflower, divide into small florets and wash. Cook in boiling salted water for about 5 minutes. In the meantime mix mustard, starch and cream. Season to taste with salt, pepper and a little sugar.
Take out the vegetables and rinse with cold water. Peel, wash and slice the potatoes and carrots. Pluck ham roughly into pieces. Layer ham, potatoes, broccoli, carrots and cauliflower in a greased casserole dish (approx. 1.6 litres capacity).
Pour over the mustard cream and sprinkle with cheese. Bake in the preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) for 35-45 minutes until golden brown. Remove the casserole and garnish with parsley leaves.