Heat a large skillet over medium heat. Add ground beef, diced onion, and minced garlic. Cook until the beef is fully browned and onions have softened. Season with salt and pepper.

Take the skillet off the heat and let the mixture cool for a few minutes. Stir in the shredded cheddar until it melts and combines with the beef.

Place an eggroll wrapper on a clean surface with one corner facing you. Spoon about 2 tablespoons of beef mixture near the bottom corner.

Fold the corner over the filling, fold in the side corners snugly, and roll it up tightly. Use water on the final corner to seal.

Heat oil in a deep skillet or fryer to 350°F (175°C). Fry the eggrolls in batches for about 2 to 4 minutes until golden brown and crisp, turning occasionally.

Transfer fried eggrolls to a paper towel-lined plate to drain excess oil. Serve hot with your favorite dipping sauces.