Spiced tomato and lentil soup with corn and coriander

Ingredients

• 2 tablespoons olive oil
• 1 tablespoon sambal oelek (hot chilli sauce)
• 2 garlic cloves, crushed
• 2 teaspoons sweet paprika
• 1 teaspoon ras el hanout (Moroccan spice mix)
• 1/2 teaspoon dried thyme
• 1 cup dried red lentils
• 700 millilitres bottle tomato passata
• 2 cups vegetable stock
• 2 fresh bay leaves
• 2 corn cobs, husks and silks removed
• natural yoghurt, coriander leaves, pappadums to serve