Sauté onion, tomato and sweet pepper together in a large soup pan with some butter or oil until translucent.
Add half a bottle of beer and let it simmer for a couple of minutes.
Add a little of the combined stock and the mustard and blend with a stick blender until smooth. Add additional stock until it has the right consistency.
In the mean time fry the diced bacon until crispy and let it drain on paper towels
Pour the soup in deep plates or bowls and finish off with some bacon, cream, tabasco and parsley.