For the bordelaisehaube dill wash, shake dry. Pluck the dill pennants from the stalks, except for some garnish, and cut finely. Roughly dice the toast and crumble it into fine toast crumbs in the universal chopper. Wash lemon hot, grate dry and grate peel thinly. Halve the fruit and squeeze 1 half. Mix butter, toast crumbs, dill, mustard, lemon zest, 1 tbsp lemon juice and 1 tsp salt. Season to taste with pepper
Wash the fish, dab dry. Place the fish in a greased casserole dish and spread the bordelai hood over the fish. Cook in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 30-40 minutes
For the rice, peel the onion and cut into fine cubes. Heat the oil in a pot. Sauté onion and rice for about 3 minutes while turning. Add tomatoes, stock and 200 ml water. Bring to the boil and simmer while stirring for about 30 minutes. Add peas to the rice about 5 minutes before the end of the cooking time. Cut remaining lemon into slices. Arrange fish and rice and garnish with dill and lemon wedges