1. Heat 2 teaspoons of oil in a large nonstick skillet over medium-high heat. Saute beef and garlic until beef is browned (3-4 minutes). Season with pepper and set aside.
2. Cook noodles according to package directions.
3. While noodles cook, heat remaining 2 teaspoons of oil over medium-low heat until hot. Add mushrooms, onions, and paprika and cook until vegetables are tender, adding water if needed to prevent pan from going dry (3-5 minutes).
4. Stir in broth and bring to a boil. Add peas and simmer until peas are tender (2-3 minutes).
5. Return beef to skillet and stir in sour cream. Cook until heated through. Do not allow to boil.
6. Serve beef mixture over noodles. Garnish with tomatoes.