Mix the flour, salt, sesame seeds, poppy seeds, millet seeds and sunflower seeds in a bowl.
Stir the water into the yeast and add to the bowl.
Blend with a spatula for 2 minutes and add the pieces of candied orange and walnuts. Mix again until you have a smooth dough and finish by kneading with a rolling pin.
Shape the dough into a ball, put it back in the bowl and cover with a cloth. Leave to rest for 90 minutes in a warm place.
Take the ball of dough, divide it into 3 equal pieces and leave to rest, covered, for 10 minutes. Shape the dough into 3 loaves and flatten them out using a rolling pin. Place the loaves on 2 baking sheets and leave to rest, covered, for 2 hours.
Put the loaves in an oven pre-heated to 220°C and bake for 30 minutes.
After removing them from the oven, sprinkle with a mixture of seeds and a few pieces of candied orange.