Fluffy Omelet Curry

Name: Fluffy Omelet Curry
Ingredients: ¾ cup whole milk; ¼ cup finely chopped cilantro; 1½ tsp. Diamond Crystal or 1 tsp. Morton kosher salt; ½ tsp. ground turmeric; 6 large eggs; 2 tsp. Diamond Crystal or 1¼ tsp. Morton kosher salt; 1 tsp. garam masala; 1 tsp. ground coriander; 1 tsp. paprika; ½ tsp. cayenne pepper; ½ tsp. ground cumin; 5 Tbsp. unsalted butter, divided; 1 tsp. cumin seeds; 1 large onion, finely chopped; 5 garlic cloves, finely grated; 1 2 piece ginger, finely grated; 2 Tbsp. double-concentrated tomato paste; ⅓ cup heavy cream; Cilantro leaves with tender stems and steamed white rice or roti (for serving)