Based on English “brown sauce,” this dark and tangy condiment is best served with nicely charred red meat.
Heat in a medium saucepan over medium-high heat:
Add and cook, stirring, until browned, 8 to 10 minutes:
Add and cook, stirring, about 1 minute more:
Stir in:
Bring to a boil, then reduce the heat and simmer gently for 10 minutes. Transfer to a blender and puree until smooth. Thin the sauce to the desired consistency with:
Let cool completely. Store refrigerated for up to 6 months.