How long do you cook a 1.5kg boned turkey crown?

It's impossible to give you an exact cooking time for a 1.5kg boned turkey crown without knowing more information. Here's why:

* Oven temperature: Cooking time varies drastically depending on your oven temperature. A higher temperature means faster cooking, and vice versa.

* Size and thickness: Even within the 1.5kg range, the thickness of the crown can affect cooking time. A thicker crown will take longer.

* Stuffing: If you're stuffing the crown, this will add to the overall cooking time.

Here's what I recommend:

1. Follow the recipe: Most recipes for boned turkey crown will give a specific cooking time and temperature. It's always best to follow those instructions closely.

2. Use a meat thermometer: The most accurate way to ensure your turkey crown is cooked through is to use a meat thermometer. Insert the thermometer into the thickest part of the meat (avoiding bone), and check for an internal temperature of 165°F (74°C).

General cooking time guidelines:

* For an unstuffed crown: Plan for about 20-25 minutes per 500g (1lb) at 180°C (350°F).

* For a stuffed crown: Add an additional 15-20 minutes to the cooking time.

Remember: It's always better to err on the side of caution and check for doneness with a thermometer.