What is a state prepared in the oven?

You're likely thinking of a dish that's cooked in the oven, not "prepared".

Here are some common dishes cooked in the oven:

* Roasted vegetables: This is a common way to cook vegetables, giving them a crispy exterior and tender interior.

* Baked chicken or fish: This is a simple and healthy way to cook protein, and it can be seasoned and flavored in many different ways.

* Lasagna: This classic Italian dish is made with layers of pasta, meat sauce, cheese, and vegetables, and it's baked until bubbly and golden brown.

* Bread: Many types of bread are baked in the oven, from sourdough to baguettes to challah.

* Cookies: This is a classic dessert that's always a hit.

* Cakes: Many types of cakes are baked in the oven, from chocolate cake to pound cake to cheesecake.

If you can give me more context, like what kind of dish you're thinking of, I might be able to give you a more specific answer.