Recs.
Updated
The IKEA Vardagen Rectangular Oven Dish offers a very high quality for its low cost. It has a large enough capacity for any kind of casserole or lasagna, a durable enameled cooking surface, and a quite high resistance to thermal shock.
SpecsUpdate
Pros
Pro Can go from the freezer straight to the oven and then be served on the table
This stoneware casserole can be transferred from the freezer straight to the oven and then be served on the table. The important thing is to preheat the oven up to 350 ºF at most, or better yet, put the frozen dish in the cold oven and let it heat up gradually.
Pro Easy to clean and durable cooking surface
The enameled cooking surface of this casserole is scratch-resistant. However, only wooden, plastic, or silicone utensils are recommended. It is also non-porous and slick, so any burnt food residue easily comes off with a bit of soaking in warm water. The oven dish can also be safely put in the dishwasher.