Fenland celery, herb and bacon parcels recipe

Ingredients

• 8 Fenland celery sticks, cut into 3cm pieces, removing tough ends/strings
• 200 g smoked bacon lardons
• 1 red onion, peeled and cut into wedges
• 1 pinch chopped sage
• 1 pinch chopped thyme
• 1 pinch chopped rosemary
• 4 tbsp olive oil
• 2 tsp Dijon mustard
• 2 tsp cider vinegar