Preheat the oven to 200 ° C. Rub the lemon peel or peel off the zest. Wash the fish fillet, pat dry, season with lemon juice, salt and pepper and place in a lightly greased baking dish.
Clean the pepper and cut it into very small cubes. Put the rusks in a plastic bag and crumble finely with the rolling pin. This also works very well in the Blitzhacker and becomes even finer in the process.
Then mix the rusk crumbs, breadcrumbs, grated lemon zest, diced paprika, herbs, vegetable stock and a little more pepper in a bowl. Stir in the oil and mustard and, if necessary, gradually add a little more water until the mixture is spreadable.
Spread on the fish and bake the fish in the oven for about 25 minutes until golden brown.