Ingredients
Method
1.Preheat oven to 180°C. Grease an 11cm x 34cm loose-based flan pan.
2.Line pan with pastry sheets, trimming to fit and pressing to seal. Chill.
3.In a medium frying pan, melt butter on medium. Add sliced white onion and cook, stirring, for 4-5 minutes until softened. Reduce heat to low and cook for a further 10 minutes until golden. Stir in sugar and vinegar. Increase heat to high and cook, stirring, until sticky. Set aside to cool.
4.In a medium bowl, toss red onion and remaining white onion with olive oil and garlic. Set aside.
5.Spread caramelised onion over pastry. In a jug, whisk eggs, cream and thyme together. Season. Pour into pastry case. Top with onion wedges. Bake for 30-35 minutes.
6.Arrange cheese on top and return to oven until cheese melts. Scatter with extra thyme. Serve with salad.