02Heat oil in a large heavy pot over medium heat. When oil is hot enough to gently sizzle a pinch of paste, add all the paste and cook, stirring often, until golden, 5 to 7 minutes. Reduce heat as needed to prevent browning.03Using a heavy object like a glass measuring cup, smash lemon grass stalk, crushing lightly just until bendable. Tie in a knot, pulling gently on both ends. Add to pot with cinnamon and lime leaves. Cook 1 minute more, until cinnamon is fragrant.04Scrape paste to one side and add chicken to pot. Raise heat and brown chicken lightly on both sides, about 10 minutes total. Add 1 cup coconut milk, 1 1/4 cups water and salt, stirring well and scraping up browned bits from bottom of pot. Bring to a gentle simmer and cook uncovered 40 to 50 minutes, until chicken is cooked through and sauce is thickened. Do not boil.05Add remaining coconut milk and heat through. Taste for salt. Let cool slightly and serve.