Creamy vegetable curry

Ingredients

• 2 tablespoons vegetable oil
• 1 onion, finely chopped
• 3 garlic cloves, finely chopped
• 1 inch sized piece of fresh ginger, finely chopped
• ½ teaspoon turmeric
• ½ teaspoon chilli flakes
• 1 teaspoon ground cumin
• 1 teaspoon ground coriander
• 1 tablespoon curry powder
• 450 grams red lentils
• 500 ml veg stock
• 1 x 400 g tin chopped tomatoes
• 200 grams Green Isle Frozen Mixed Vegetables
• 4 tablespoons Greek yogurt plus more to garnish
• Small bunch coriander, chopped
• Naan bread and rice to serve