Step by step recipe:

1. 5 min.

   Prepare the filling mixture

   Prepare 2 onions and chop finely.
2. 8 min.
   Pour 2 tablespoons olive oil into a frying pan on medium heat. When good and hot add the chopped onions.
   
   Brown the onions, stirring frequently. Salt and pepper at the end of cooking after taking off the heat.
   
   Set aside.
3. 5 min.
   Peel 200 g mushrooms and cut into small dice.
4. 5 min.
   Pour 3 tablespoons olive oil into a frying pan on medium heat. When good and hot add the diced mushrooms.
   
   Fry until browned, stirring frequently. Salt and pepper at the end of cooking after taking off the heat.
   
   Set aside.
5. 2 min.
   Cut 100 g Parmigiano reggiano (Parmesan) into small dice.
6. 1 min.
   Mix the onions, Parmesan and mushrooms.
7. 2 min.
   Incorporate this filling mixture into 600 g bread dough. The simplest way is to add it at the end of kneading and mix in on slow speed for 1 or 2 minutes.
   
   Note: For the best way to knead, see: A few tips for effective kneading at home.
8. 1 hour 30 min.

   Make the Parmesan baguettes

   Gather the dough into a ball, transfer to a large, clean bowl and cover with a plastic sheet.
   
   Leave to rest for 1 hour 30 minutes.
9. 20 min.
   After this, weigh out the dough into lumps of about 300 g and shape into balls.
   
   Leave to rest for 20 minutes covered with a plastic sheet.
10. 1 hour
    Next, roll the balls out into long sticks and lay in a baguette mould or tin.
    
    Leave to rest for 1 hour, covered with a plastic sheet as before.
11. 25 min.
    Bake for about 20 to 30 minutes at 250°C (480°F) until the baguettes are golden brown.
    
    Note: As when baking any bread, you should ensure that the oven is filled with steam for the first 15 minutes of baking. This page shows you how; it really is the secret of golden-brown, crusty loaves..
    
    Served sliced as an aperitif snack, for example, success is guaranteed!