01 -
Sprinkle the chicken pieces with garlic powder, salt, and pepper. Dredge each piece in flour.
02 -
Heat 2 tablespoons of olive oil in a deep skillet over medium-high heat. Cook the chicken in two batches, about 3 minutes per side, until golden brown and cooked through (165°F). For the second batch, add the remaining tablespoon of oil if needed. Set aside.
03 -
In the same pan, melt the butter. Add the mushrooms and onions, sautéing for 6-8 minutes until their liquid evaporates and they become nicely seared.
04 -
Stir in the Dijon mustard, Worcestershire sauce, and minced garlic. Cook for about 1 minute until fragrant.
05 -
Pour in the chicken broth, scraping up any browned bits from the bottom of the pan. Return the chicken to the pan and cook for another 2 minutes, stirring occasionally.
06 -
Stir in the sour cream and let it warm through for about a minute. Avoid boiling to prevent curdling. Adjust seasoning with more salt and pepper if needed.