2 tablespoons unsalted butter
1/2 tablespoon all-purpose flour
1/2 cup beef broth
1 piece beef tenderloin - (1/2 lb)
sliced 1/4" thick, then cut into 1" pieces
1 tablespoon olive oil
1/4 cup thinly-sliced shallot
1/2 pound creminis
= (quartered, if large)
2 tablespoons sour cream
1/2 teaspoon Dijon mustard
1 tablespoon chopped fresh dill
1/4 teaspoon salt
1/8 teaspoon freshly-ground black pepper
=== ACCOMPANIMENT ===
Buttered cooked wide egg noodles
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