German Meat Patties

Ingredients

• 1 yellow onion, diced small
• 1/2 cup breadcrumbs
• 1 pound ground beef
• 1 pound ground pork
• 3 eggs
• 1 tablespoon German pub-style mustard
• 3 teaspoons fresh parsley, chopped
• 2 teaspoons dried marjoram
• 1 teaspoon kosher salt
• 1/2 teaspoon ground black pepper
• 1/2 teaspoon paprika
• 4 tablespoons olive oil
• 1/2 loaf sourdough bread
• 6 tablespoons butter
• 1 bunch chives, finely chopped
• 1 bunch radishes, thinly sliced
• 1/4 cup German pub-style mustard