Mini Burgers? I think so, yes.

Imitation White Castle Burgers
Source: Food.com
Ingredients:

• 1 1/2 lbs ground beef
• 1 envelope onion soup mix
• 1 egg
• 1/2 teaspoon pepper
• 2 tablespoons water
• 1/3 cup breadcrumbs
• 24 small square dinner rolls
• sliced cheese
• pickle 

Directions:

1. Preheat oven to 400°F.
2. Mix first 6 ingredients and press into an ungreased 10 by 15 inch jelly roll pan or put into a sliders fry pan.
3. Prick with a fork. Bake for 10 minutes.
4. Drain off juices. Cool.
5. Cut into 24 squares and place on dinner rolls.
6. Drizzle desired amount of ketchup and mustard. Top with pickles and cheese.