Wash the fillet, dab dry and cut into about 12 medallions. Fry on both sides in hot oil until golden brown, season. Take out
Romanesco clean, wash and cut into florets. Cook in boiling salted water for 3-5 minutes. Drain
Bring cream and 200 ml water to the boil. Stir in sauce powder, bring to the boil again. Whip 30-40 g butter (less than indicated on the package) into it. Grate cheese and melt in the sauce while stirring. Season to taste
Place the vegetables and meat in a greased casserole dish (approx. 30 cm long). Pour sauce over it. Bake in a hot oven (electric cooker: 200 °C/circulating air:175 °C/gas: level 3) for 15-20 minutes
Wash, quarter and seed the tomato. Finely dice the flesh and sprinkle over the gratin. Garnish with tomato and basil if desired. Goes well with parsley-potatoes