1. Sauté the base
Heat a little butter or oil in a pan.
Add the diced onion and the diced smoked ham (or bacon).
Cook over medium heat until the onion softens and the ham starts to brown lightly.
This creates the aromatic base of the sauce.
2. Add the mushrooms
3. Add the tomato element
Stir in the ketchup or tomato paste.
Let it cook for 4–5 minutes to lightly caramelize and build deeper flavor.
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