One-Pot Eggplant Lentil Curry

Ingredients

• tablespoon neutral oil
• Tablespoon cumin seeds
• Tablespoon wholegrain mustard
• large onion
• garlic, crushed
• inch ginger, finely grated
• Tablespoon ground coriander
• cayenne pepper
• black pepper
• medium tomatoes
• large aubergine
• split red lentils
• teaspoon salt
• vegetable stock
• Tablespoons lemon juice
• Tablespoon brown sugar
• Optional ½ tsp garam masala
• Optional, ¼ cup coconut milk