In a large stockpot, heat oil on medium heat.
Saute onion for one minute, and add garlic. Saute for one more minute.
Add broth, tomatoes, spices, Worcestershire, carrots and cabbage- simmer on low/medium heat until carrots cook (only takes 2-3 minutes).
GENTLY add pierogies. If using fresh made, simmer for 2 minutes.
Garnish with bacon and chopped scallions, as desired.