Bacon burger with BBQ relish

1 bunch spring onions
380g extra lean minced beef
2 tsp freshly chopped parsley
salt and freshly ground black pepper
half a small red pepper
2 ripe tomatoes
1 tsp barbecue seasoning
2 tbsp freshly chopped chives
4 rashers back bacon, all visible fat removed
green salad leaves
4 x 60g wholemeal rolls