In a medium pot, add the ground beef, ginger-garlic paste and salt with 1 cup of water.
Mix well to ensure there are no lumps in the meat mixture.
Cook on low, medium heat, occasionally stirring to make sure the meat doesn’t burn. Cook thoroughly until the beef is cooked and the water has evaporated completely.
If the ground beef has released any oil, drain it along with any excess water.
When the meat is fully cooked, remove from heat, and cool the mixture thoroughly.
Once cooled, add the ground cumin powder and black pepper mix well. Add the onion, cilantro, and green chili.
Taste and adjust any spices.
Make the Slurry
In a small bowl, add flour and add water a little at a time to get a consistency similar to cream. The slurry should drip off a spoon easily but not be as thin as water.
If using spring roll sheets, layer two sheets together and cut them into three rectangles.
Keep the sheets covered with a dishtowel while you work.
Fill, Fold and Fry the Samosa
Fold the rectangle one-third of the way, bring the top right corner to the bottom. Then fold it over itself to form a pocket.
Hold the samosa pocket with one hand and add about 1-2 tablespoons of the filling into the pocket, packing the beef mixture into the pocket.
Fold the hanging piece over to close the pocket.
Apply the slurry, then make the final fold to close the triangle. Make sure the samosa is tightly closed, so the filling does not fall out.
Keep covered under a dishtowel until ready to fry.
Once ready to fry, add oil to a frying pan on low heat, enough to deep fry the samosa. Once the oil is hot, add the samosas. Do not crowd the pan; work in batches if you need.
Fry on low heat, turning every couple of minutes till golden brown.
Use a slotted spoon or strainer to transfer samosas to a plate lined with a paper towel.