Preheat the oven to 400°F (200°C).

In a mixing bowl, combine ground beef, bread crumbs, egg, garam masala, cumin, coriander, salt, black pepper, and cilantro.

Mix until well combined, then form into 1-inch meatballs.

Place meatballs on a baking sheet and bake for 20 minutes or until cooked through.

In a skillet, heat vegetable oil over medium heat.

Add chopped onion and sauté until translucent, about 5 minutes.

Stir in garlic and ginger, cooking for another minute.

Add curry powder and cook for 1 minute until fragrant.

Pour in coconut milk and chicken broth, stirring to combine.

Bring to a simmer and let cook for 10 minutes.

Add lime juice and sugar, then stir in the baked meatballs.

Simmer for an additional 5 minutes to heat through.

Serve the meatballs in curry sauce over rice or with naan.

Garnish with additional cilantro if desired.