Heat a large skillet over medium high heat. Add the olive oil and brown the ground beef. As the beef is cooking, slice the mushrooms and add the mushroom slices to the partially cooked ground beef.
Combine the seasonings while that finishes cooking.
Add all other ingredients (except sour cream) to the cooked beef.
Stir to combine and cover. Bring to boil, then lower heat to medium low and allow to simmer for 10-12 minutes, or until the noodles are cooked through. (The time may vary depending on the type of noodles you use. Read the directions on the package.)
Add the sour cream and let sit for 5 more minutes. Serve immediately.