01 - Preheat oven to 400°F. Line baking sheet with parchment paper.
02 - Roll puff pastry onto prepared sheet. Fold edges inward to create 1-inch border. Prick base with fork.
03 - Bake pastry 10 minutes until lightly golden. Remove from oven and press down any puffed areas.
04 - Whisk eggs, milk, cream, Dijon mustard, salt, pepper, and smoked paprika until smooth.
05 - Distribute bacon, spinach, tomatoes, and spring onions over pastry base. Sprinkle with cheddar cheese.
06 - Pour egg mixture evenly over fillings.
07 - Return to oven and bake 25 minutes until center is just set and top is golden.
08 - Cool 5-10 minutes. Garnish with chopped chives, slice, and serve warm.