Toast the slices of bread in the same frying pan as the bacon.
Add a dash of oil to each and then add the sliced gherkins, the spring onions, the bacon cubes, 3 slices of cheese, 2 cherry tomatoes chopped in half and 2 walnuts to each.
Bake in the oven at 200 degrees for 5 minutes.
Remove and put a few leaves of parsley and rocket, the olive oil, a pinch of paprika and a drop of lemon juice and place a slice of ham on each one.