01 - Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper.
02 - In a large mixing bowl, combine the ground turkey, breadcrumbs, milk, large egg, finely chopped parsley, minced garlic, onion powder, salt, and black pepper. Mix gently until just combined, being careful not to overmix.
03 - With damp hands, roll the mixture into 20–24 small, uniform meatballs. Arrange them evenly on the prepared baking sheet.
04 - Bake the meatballs for 15–18 minutes, or until they are cooked through and have achieved a lightly golden brown color.
05 - While the meatballs are baking, heat the olive oil in a large skillet or Dutch oven over medium heat. Add the sliced mushrooms and finely diced onion, sautéing for 5–7 minutes until they are softened and lightly browned.
06 - Stir in the minced garlic and cook for an additional minute until fragrant. Sprinkle the all-purpose flour over the vegetables and stir continuously for 1–2 minutes to coat them thoroughly.
07 - Gradually whisk in the low-sodium chicken broth, Worcestershire sauce, and Dijon mustard. Bring the mixture to a gentle simmer and cook for 3–4 minutes, stirring occasionally, until the sauce begins to slightly thicken.
08 - Reduce the heat to low. Stir in the sour cream until the sauce is smooth and creamy. Season the sauce with salt and black pepper to your taste.
09 - Gently add the baked turkey meatballs to the simmering sauce, spooning some of the sauce over them to ensure they are well coated. Continue to simmer for 2–3 minutes to heat the meatballs through.
10 - Serve the turkey meatballs and creamy stroganoff sauce immediately over cooked egg noodles. Garnish with fresh chopped parsley before serving.