Place sardines in a food processor; puree until smooth.
Add eggs, bread crumbs, paprika, turmeric, ginger, garlic powder, onion powder, salt, and black pepper.
Pause briefly until well-combined.
Shape mixture into small balls.
Heat oil in a large skillet over medium heat.
Add onion and garlic; cook and stir until fragrant, about 5 minutes.
Stir in tomatoes, coriander, and cumin.
Reduce heat, cover, and simmer sauce until flavors combine, about 15 minutes.
Stir in meatballs and simmer until heated through, about 5 minutes.