Knead together 1 TBSP of room-temperature butter and 2 TBSP of flour
Melt 1 TBSP of butter in sautee pan under medium heat
Sautee shallots and garlic in pan for about 3-4 minutes, until soft.
Add wine to pan and simmer until the liquid mostly evaporates
Add broth to pan and bring to a simmer
Add butter/flour mixture to the pan and whisk until fully combined
Simmer for 5-10 minutes until thickened
Whisk nutmeg, jam, and mustard into sauce
Continue to whisk until ingredients are fully combined.
Add salt and pepper to taste.