Individual quiche Lorraines are the perfect bite-sized treat

Ingredients

• 3 x 25cm square sheets frozen shortcrust pastry, partially thawed
• 1 tablespoon olive oil
• 1 brown onion, finely chopped
• 200g rindless bacon, chopped finely
• 1 tablespoon thyme leaves, plus extra sprigs, to garnish, optional
• 2 free-range eggs
• 2 teaspoons dijon mustard
• 200ml thickened cream
• 1/3 cup full-cream milk
• Sea-salt flakes and freshly ground black pepper
• 60g coarsely grated Gruyère or tasty cheese