Can this be made in under 30 minutes?

Yes, the recipe is designed to be quick and efficient.

Does it work for meal prep?

Most versions store well for one to three days.

Yes, simple swaps can be made for convenience or dietary needs.

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Combine chopped corned beef, Swiss cheese, sauerkraut, cream cheese, 1/4 cup breadcrumbs, and 1 beaten egg in a bowl. Mix until evenly blended.
Roll the mixture into 1 to 1.5-inch balls. Chill on a tray in the freezer for 30 minutes to firm.
Set up three bowls: one with flour, one with a beaten egg, and one with the remaining breadcrumbs. Coat each ball in flour, then egg, then breadcrumbs.
Heat oil in a deep fryer or skillet to 350°F (175°C). Fry the balls in batches for 3-4 minutes or until golden brown. Drain on paper towels.
In a separate bowl, mix mayonnaise, ketchup, relish, hot sauce, and smoked paprika for the dipping sauce. Adjust spice to preference.
Serve the Reuben Balls hot with the spicy Thousand Island sauce on the side.

For quick prep, use pre-shredded Swiss and pre-chopped corned beef. You can freeze the uncooked balls for up to 2 months.