BAKED TOMATO, GRUYèRE & POTATO GRATIN

Baked tomato, gruyère & potato gratin image

Layer up sliced potatoes and tomatoes with a cheesy, creamy sauce, then top with walnuts and breadcrumbs for a vegetarian bake

Provided by Sarah Cook

Categories Dinner, Lunch, Main course, Supper

Time 1h40m

Number Of Ingredients 12

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Ingredients

a few knobs of butter , plus extra for greasing
4-5 thyme sprigs
200g gruyère , grated
100g parmesan (or vegetarian alternative), finely grated
500ml pot double cream
300ml vegetable or chicken stock
1 ½kg large potatoes , thinly sliced (on a mandolin if you have one)
8 round shallots or 4 banana shallots, thinly sliced
3 fat garlic cloves , finely chopped
100g walnuts , chopped
650g mixed tomatoes , sliced
5 tbsp dried breadcrumbs

Steps:

Heat oven to 180C/160C fan/gas 4. Generously grease a large, deep, ovenproof dish. Strip the leaves from 3 of the thyme sprigs. Mix the gruyère with all but 2 tbsp of the grated parmesan, then mix the double cream with the stock.
Start layering up the sliced potatoes with sprinklings of the shallots, garlic, thyme leaves, cheese and most of the walnuts, plus plenty of seasoning. Drizzle a little of the cream mixture over each layer too. When you've layered in half of those ingredients, top with half of the tomatoes. Continue layering the rest of the ingredients, finishing with the last of the cream. Top with the remaining tomatoes, then sprinkle over the breadcrumbs, the remaining parmesan and walnuts, and enough thyme to look pretty. Add a few more knobs of butter, then cover with foil.
Bake the gratin for 1 hr 15 mins, then remove the foil and bake for a further 40 mins until golden and crispy on top, and a knife poked into the centre of the potatoes slides in easily. Leave to rest for 10-15 mins, then serve.

Nutrition Facts : Calories 622 calories, Fat 45 grams fat, SaturatedFat 24 grams saturated fat, Carbohydrate 34 grams carbohydrates, Sugar 5 grams sugar, Fiber 4 grams fiber