Lighten Up Charleston

Ingredients

• 4 medium parsnips, peeled and quartered lengthways
• 1 butternut squash (about 650g/1 lb 7oz), peeled, seeded and cut into chucks
• 2 red onions, each cut into 8 wedges
• 1 tbsp olive oil
• grated zest of 1 lemon
• 2 tsp pork seasoning or dried mixed Italian herbs
• 500g lean pork tenderloin, in one or two pieces
• 1 medium bramley apple
• 400ml hot chicken stock