In a medium pot, combine the heavy cream and chicken broth.
Set heat to medium and bring to a bubble. Leave to simmer during the next step.
In a sauté pan, melt the butter.
Once butter is melted, add optional shallots and saute until translucent. Add sorrel leaves and wilt. The leaves will reduce significantly and turn a darker green.
Once the leaves are reduced, scrape the wilted sorrel into your bubbling cream mixture. Add salt. Stir to combine.
Allow the sauce to come together over the heat for 2-3 minutes. If the sauce is too thick, add more chicken broth, a tablespoon at a time to thin.
Taste sauce and add salt and pepper as desired.
Squeeze optional fresh lemon juice over the top, stir once more.
Serve over fish, chicken, other poultry, roasted vegetables, or poached eggs.