Wunderbar Schnitzel Sandwiches

Ingredients

• leaf parsley
• 2/3 cup bread crumbs
• 2 tsp Dijon mustard
• 1 tsp minced garlic
• 1 egg yolk
• 1/8 tsp ground black pepper
• 1/4 cup canola oil
• 2 eggs
• 1/4 cup milk
• pinch of salt and pepper
• 1/2 cup all-purpose flour
• 2 cups panko
• 1/2 cup mayonnaise
• pinch of black pepper
• 1/4 cup prepared horseradish
• 1/2 tbsp Dijon mustard
• 4 pretzel buns
• leaf lettuce
• sliced dill pickles
• sliced red onion