Broccoli mustard pasties

Quick puff pastry

• 300 g unsalted butter, cut into small pieces (1-2 cm) and frozen
• 300 g plain flour, plus extra for dusting
• 140 g chilled water

Broccoli mustard pasties

• 180 g cheddar cheese, cut into cubes (3-4 cm)
• 150 g mozzarella cheese, cut into cubes (3-4 cm)
• 80 g brown onion, cut into halves
• 1 garlic clove
• 100 g swede, peeled and cut into quarters
• 20 g olive oil
• 1 tsp English mustard, plus extra to serve
• 2 tsp Dijon mustard, plus extra to serve
• 300 g broccoli, broken into florets
• 1 pinch salt, to taste
• 1 egg, lightly beaten
• 3 tsp poppy seeds