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120 g smoked ham (Black Forest style)
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2 tbsp ketchup or tomato paste
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1 tbsp flour
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A splash or two of dry white wine
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A drizzle of oil or a knob of butter
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1 medium-to-large onion
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250 ml thick heavy cream (crème fraîche style)
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1 heaping tbsp beef bouillon or sauce mix
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2 pinches of salt and pepper