Combine the chopped green chilis, garlic, turmeric, paprika, vinegar and salt in a large non-reactive mixing bowl. Add in the shrimp and let it marinate for 10 minutes
Preheat a large skillet with oil. Saute the onion until soft and fragrant. Add in the marinated shrimp and stir-fry for about 2 minutes. Add in chicken broth and bring to a boil and then lower the heat to let it gently simmer until the broth is reduced. Stir in the lemon juice and garam masala. Give it one last stir and transfer to a serving platter. Garnish with cilantro leaves and serve immediately with steamed rice