Caramelised Onion and Wholegrain Mustard Tart

Name: Caramelised Onion and Wholegrain Mustard Tart
Yield: Serves 4-6
Cuisine: British
Ingredients: 4 large white Spanish onions, thinly sliced; 2 sprigs thyme, leaves only; salt and freshly ground black pepper; 1 tbsp good-quality wholegrain mustard; 1 recipe Shortcrust Pastry or 170 g shop-bought; 4 eggs and 2 egg yolks; 2 tbsp vegetable oil; 200 ml double cream; 30 g butter; 100 g End-of-Season Tomato Chutney (optional)

Preparation info

Serves
4-6

Difficulty
Easy

Appears in

Café Cooking

By Gillian Veal

Published 2024

About

I love the simple combination of sweet onions and warming mustard, but sometimes I add a layer of tomato chutney to the base if I’ve got some on hand, and it works wonderfully.

Ingredients

30 g butter
2 tbsp vegetable oil
4 large white Spani

Europe
United Kingdom
London
Pie
Vegetarian

Method

Preheat the oven to 220°C (200°C fan).

Heat a heavy-bottomed pan, large enough to fit all the onions in, and melt the butter and oil together. Then add the onions and cook gently until meltingly soft and sweet. This will take at least 45 minutes: the longer they