Wash the fish, dab dry and cut in half lengthwise. Sprinkle with lemon juice, let stand briefly
Wash, clean and slice the tomatoes. Clean, wash and chop the spring onions. Heat oil. Steam vegetables in it. Deglaze with broth. Stir in soy cream and mustard, season
Season fish with salt and pepper. Place in an ovenproof dish with vegetables and mustard cream. Gratinate in the preheated oven (electric cooker: 225 °C/recirculating air: 200 °C/gas: level 4) for 15-20 minutes. Goes well with rice