Spicy Ham & Cheese Croissants

6 slices of streaky bacon, cooked until crisp and drained on paper towel

1 large onion, peeled and finely sliced

8 TBS butter, divided

3 tsp smooth Branston pickle

Additional Branston for spreading on the croissants

6 medium sized croissants

12 slices of deli ham

6 slices Swiss style cheese

Melt 1 TBS of the the butter in a skillet.  Add the
sliced onions.  Cook over very low heat for 30 minutes until
caramelised, stirring occasionally. 

Preheat the oven to180*C/350*F/ gas mark 4. 

Melt
 the remaining butter and whisk together with the Branston pickle
until smooth. Have ready a large enough baking dish to hold all of the
croissants in one layer.  Cut each croissant in half through the middles
 horizontally. Brush the bottom side of the bottoms of each croissant
with some of the butter mixture.  Lay out in the baking dish in one
layer.  Spread a bit of Branston pickle on the cut side and then
divide the caramelised onions between each evenly.  Top with the sliced
ham, two slices of bacon and a slice of cheese, folded to fit.  Brush
the cut sides of the top halves of the croissants with half of the
remaining butter mixture and place on top of the cheese. Drizzle the
remaining butter mixture over top of each. Cover with aluminium foil and
 bake in the preheated oven for 20 minutes.