Plum Tomato, Olive & Marjoram Tart | Mary Berry

Ingredients

• For The Pastry
• 150g (5oz) plain flour, plus extra for dusting
• 75g (3oz) butter, chilled and cut into cubes
• 1 egg, beaten
• For The Filling
• 2 eggs
• 200ml (7fl oz) full-fat crème fraîche
• 50g (2oz) Cheddar cheese, grated
• 50g (2oz) Parmesan cheese, grated
• 1 tbsp finely chopped marjoram
• 6 large plum tomatoes, skinned (see tip) and sliced into rounds
• 12 pitted black olives, halved
• ½ tbsp balsamic vinegar
• Salt and freshly ground black pepper