1 tablespoon peanut oil
1 shallot, finely chopped
1/4 white onion, chopped
2 tablespoons butter
2 teaspoons lemon juice
1 tablespoon ginger garlic paste
1 teaspoon garam masala
1 teaspoon chili powder
1 teaspoon ground cumin
1 bay leaf
1/4 cup plain yogurt
1 cup half-and-half
1 cup tomato puree
1/4 teaspoon cayenne pepper, or to taste
1 pinch salt
1 pinch black pepper

1 tablespoon peanut oil
1 pound boneless, skinless chicken thighs, cut into bite-size pieces
1 teaspoon garam masala
1 pinch cayenne pepper
1 tablespoon cornstarch
1/4 cup water