Babinka's Czech Dill Sauce

This sauce is traditionally served over Czech dumplings and pork or corned beef. The Czech would even put this over cooked Carp (fish) for Christmas. I have not found a way to make Czech dumplings Keto. However this sauce could go well over various types of meat, or hearty vegetables such as cauliflower.

Ingredients -- Ovo-Lacto Vegetarian

1+1/2 cups sour cream and/or plain unsweetened yogurt
1 cup white wine, divided (3/4 cup and then 1/4 cup)
2 small Green Onions
1/2 cup mushrooms, chopped fine
1 packet or tsp. chicken bouillon concentrate
Quantity of milk to dilute the sauce (about 2 to 3 cups), regular cow's milk or creamy oat milk etc. will do
1 heaping Tbsp dried Dill Weed
2 Tbsp Lemon Juice
Arrowroot or keto flour such as coconut flour, to thicken sauce (about 1 heaping Tbsp)
black pepper to taste (dash)

Sautée the onions and mushrooms in a bit of oil. When they start to go soft, add the 3/4 cup wine and continue sautéeing for about two minutes. Add the sour cream and spices, including bouillon, but not the Arrowroot thickener nor lemon juice. Allow to boil about 5 minutes. Dilute the sauce with milk or water until it's a bit runnier than you would want. Allow to boil again. Mix the Arrowroot with the remaining wine and stir well until completely dissolved. Sprinkle throughout the sauce and mix thoroughly and rapidly to avoid clumps. Remove from heat and add the lemon juice. Mix well.