In a large stock pot sauté the onion and carrots in butter until soft.
Add garlic and sauté for one minute or until lightly golden.
Add one cup of the broth and purée using a stick blender.
Stir in the flour simmer 2-3 minutes to cook the flour.
Add beer, remaining chicken stock and bring to a low boil.
Stir in the Dijon, Worcestershire, lemon juice, and spices and simmer 15 minutes.
Remove from heat and stir in the half & half and cheese until smooth.
Salt and pepper to taste. Top with the pretzels and serve!