spiced cabbage with tomatoes

Ingredients

• 400 g canned chopped tomatoes, or whole peeled tomatoes, diced
• 2 onions, chopped
• 1 piece fresh ginger, about 10×5 mm, finely grated or chopped
• 1 green chili, deseeded and chopped
• 45 ml oil
• 1/8 tsp turmeric powder
• 1 tsp coriander powder
• 1 kg cabbage, white or savoy, sliced thinly
• salt and chili pepper powder
• fresh coriander, if wished to garnish