Combine Ground Beef and simple ingredients in one skillet for a crowd pleasing dish that doesn't require extra work.
Heat large nonstick skillet over medium heat until hot. Add Ground Beef, mushrooms, garlic and thyme; cook 8 to 10 minutes, breaking Ground Beef into 3/4-inch crumbles and stirring occasionally. Pour off drippings, as necessary.
Stir noodles and broth into beef mixture. Bring to a boil. Cover and cook 9 to 10 minutes or until noodles are tender, stirring twice. Stir in peas; continue cooking, uncovered, 3 to 5 minutes or until peas are heated through, stirring occasionally.
Remove from heat; stir in 1/4 cup sour cream and mustard. Season with salt and pepper, as desired. Garnish with additional sour cream, if desired.
Test Kitchen Tips Use a potato masher to break up Ground Beef into small crumbles while browning.