Lobster Tikka Masala

Name: Lobster Tikka Masala
Ingredients: 32 ounce fresh maine lobster meat, diced; 45 ounce tomato purée; 3 cup water, room temperature; 4 teaspoon butter; 8 ounce heavy cream; 1 medium red onion, chopped; 3 teaspoon garlic paste; 3 teaspoon ginger paste; 1/2 teaspoon cumin seeds; 1/2 teaspoon caraway seeds (ajwain); 1 ounce cilantro, chopped; 1 teaspoon garam masala; 1/2 teaspoon turmeric; 1 teaspoon salt (or to taste); 1 teaspoon sugar; 1/2 teaspoon ground black pepper; 5 cloves, whole; 1/2 teaspoon fenugreek leaves, crushed; 2 bay leaves; 1 cinnamon stick, 2 inches; 3 cardamom pods; 1 green chili pepper, chopped (optional)