If you're using fresh yeast, prepare it following packet instructions, diluting it in the milk. If you use dry yeast instead, just add it all to the dough when the recipe calls for it.
Mix flour, yeast diluted in milk (or milk and dry yeast), melted butter, sugar and orange blossom water. Knead the dough vigorously until it's soft, smooth and firm. Add all the other ingredients: sultanas, dried fruits, pinenuts and knead for another 30 minutes. Form a dough ball, cover it with a tea towel and and let it rise for 12 hours in a warm place.
When baking time comes, butter up and flour an oven dish, place the dough in it, making three cuts on its surface to form a triangle. Bake in an already hot oven at 360 F (180 C) for 60 minutes.