Kotlet Mielony (Polish Pork Patties)

Ingredients

• 1 lb ground pork
• 1/2 lb ground beef
• 1 stale roll soaked in milk and squeezed
• 1 egg
• 1 small onion grated
• 1 clove garlic
• 1 tsp salt
• 1/2 tsp pepper
• 1 tsp marjoram
• 1 cup breadcrumbs
• Oil and butter for frying