Cut leek into 2-inch sections. Cut sections into fine julienne strips.
Combine leek strips, wild mushrooms, and cream in a medium saucepan. Bring to a boil, lower heat, and cook for about 5 minutes or until the cream has thickened.
Remove from heat and season to taste with salt and lemon juice. Keep warm.
Compote may be prepared several hours ahead. Keep warm or reheat gently.
Sauce may be prepared several hours ahead. Keep warm or reheat gently if necessary.
Recipe by Not Just Sunday Dinner at https://notjustsundaydinner.com/venison-medallions-with-blueberry-sage-sauce-and-compote-of-leek-and-wild-mushrooms/