Wash and dry the carrots and celery, and then cut them in half if they are too big.
Cut the onion in half and fry it with a little oil in a pan, to color it slightly and give a classic golden color to the broth.
Add all ingredients to a large pot. Make sure the water covers all the ingredients well.
Bring the pot to a boil uncovered, carefully skimming off any foam that rises to the surface.
Once skimmed, reduce heat to a gentle simmer and cover. The broth should bubble softly. Let it simmer for at least 2–3 hours. This extended cooking time allows the flavors to meld and intensify, resulting in a rich, flavorful base for your tortellini.
When the broth is ready, strain it through a fine cloth to achieve a clear, flavorful liquid.
Let the broth cool and then skim off any fat that rises to the surface for a leaner broth.
This classic bolognese broth serves as the perfect base for your homemade tortellini, elevating the dish with its rich, complex flavors.