Caramelized Onion & Mustard Tart

• 50 g butter
• 1 tablespoon olive oil
• 4 large yellow onions, sliced
• 1 garlic clove, crushed
• 2 eggs
• 2 egg yolks
• 50 g coarse grain mustard
• 142 ml double cream (US, heavy cream)
• 2 tablespoons of fresh mint, chopped
• 1 pie crust

1. Melt the butter with the oil in a large frying pan over medium-low heat. Add the onions and garlic. Season to taste with salt & pepper and cook for 30 minutes, stirring often, until golden. Take off heat and set aside.
2. Preheat the oven to 200u0b0C Line a pie pan or loose bottomed tart tin with the pastry/pie crust. Line with greaseproof paper (wax paper) and fill with beans and bake for 15 minutes. Remove the paper and beans and cook for another 10 minutes until golden.
3. Lower the oven temperature to 180u0b0C In a bowl, whisk together the eggs, yolks, mustard and cream. Stir in the onions and the chopped mint.
4. Spoon the mixture into the pie/pastry crust and bake for 20 minutes or until just set. Cool slightly before serving.

butter, olive oil, yellow onions, garlic, eggs, egg yolks, coarse grain mustard, cream, mint, crust

Taken from www.food.com/recipe/caramelized-onion-mustard-tart-223881 (may not work)