Leek and tahini crumble

Ingredients: 
1kg leeks
4 cloves garlic
45g butter
45g flour
570ml milk
2tbsp tahini
1-2tsp soy sauce
75g flour
75g oats
2tbsp sesame seeds
75g butter

Method: 

• Slice the leeks and finely chop the garlic
• Put 1tbp of olive oil in a pan and add the leeks and garlic
• Cook gently for ten minutes then transfer to an ovenproof dish
• Put the oven on at gas mark 6/200F
• Make up the sauce by melting the butter and then stirring in the flour
• Take the pan off the heat and slowly stir in the milk
• Add the tahini and soya sauce and season well
• Gently cook for a few minutes until the sauce is thick and pour over the leeks
• Make the crumble by rubbing the butter into the dry ingredients with a pinch of salt
• Sprinkle over the leeks and sauce and bake for 20 mins

Original Source: 
Izzy Silvester