Preheat the oven to 425 degrees and line a baking sheet with parchment.
Crack the egg into a large/medium sized mixing bowl and lightly whisk. Add in the breadcrumbs, onion, garlic, parsley, cumin, paprika, cayenne pepper, black pepper and salt. Mix until evenly combined. Add in the ground American lamb and mix using your hands unti well combined.
Roll out about 2 tablespoons of meat in your hands to form an even ball (Tip: you can coat your hands with a little olive oil to avoid stickiness!).
Place them on the lined baking sheet and cook for about 15-20 minutes or until browned on the outside and cooked throughout.
Combine all ingredients together. Add salt and pepper to taste. Refrigerate until ready to use.