1 (1-pound) top round steak (1 inch thick), trimmed
1 cup chopped onion
2 tablespoons chopped fresh parsley
2 tablespoons Dijon mustard
1/2 teaspoon salt
1/2 teaspoon dried dill
1/2 teaspoon freshly ground black pepper
1 (8-ounce) package sliced mushrooms (about 2 cups)
3 garlic cloves, minced
1.5 ounces all-purpose flour (about 1/3 cup)
1 cup fat-free, lower-sodium beef broth
1 (8-ounce) container low-fat sour cream
2 cups hot cooked medium egg noodles (about 4 ounces uncooked)