Slow Cooker Beef Stroganoff

1 ½ pounds beef chuck stew meat
1 teaspoon kosher salt
1 teaspoon dried dill weed
½ teaspoon ground black pepper
½ teaspoon garlic powder
½ teaspoon onion powder
16 ounces cremini mushrooms, sliced
1 ½ cups low sodium beef broth, divided use
3 tablespoons Worcestershire sauce
1 tablespoon Dijon mustard
¼ cup cornstarch
1 cup plain whole milk Greek yogurt
8 ounces whole wheat egg noodles
Fresh parsley or thyme, for garnish

Grease the bottom of a 6-quart or large slow cooker with nonstick spray.
Add the beef, sprinkle with salt, dill, black pepper, garlic powder and onion powder.
Stir to coat the meat.
Add the mushrooms, 1 cup beef broth, Worcestershire and Dijon.
Cover and cook on high for 2 to 3 hours or on low for 5 to 7 hours, until the beef is cooked through and tender. (If you prefer firmer mushrooms, wait to add them until about halfway through the cook time.)
Stir in the cornstarch together with the remaining ½ cup broth to create a slurry.
Stir the mixture into the slow cooker.
Cover and cook on high for 20 minutes, and then stir in the Greek yogurt.
Re-cover and cook on high for an additional 20 minutes.
While the stroganoff finishes cooking, cook the noodles according to package instructions.
Stir into the slow cooker or pile separately into bowls and ladle the stroganoff over the top.
Serve immediately, topped with fresh thyme or parsley as desired.