Sauté for 2 minutes, until soft; do not brown. Add parsley, thyme, peppercorns and chilies. Sauté 1 minute, then deglaze with vinegar and white wine. Reduce liquid to sec (almost dry). Add Tabasco and heavy cream. Bring to a boil and cook about two minutes until cream is thick. Remove sauce from heat and whisk in butter one piece at a time into sauce. Strain through fine sieve. Season with lemon juice and salt. Keep warm until ready to use.