Easy Onion Gravy (Thick and Delicious!) – Beat The Budget

Ingredients

• 2 large onions, thinly sliced ((£0.20))
• 2 sprigs of fresh rosemary ((£0.60))
• 1 tbsp butter ((£1.69/10)=(£0.17))
• 1 tbsp red wine vinegar ((£1.30/10)=(£0.13))
• 1 tbsp Worcester sauce ((£1.70/10)=(£0.17))
• 1 tbsp olive oil
• 2 tbsp flour
• 800 ml beef stock