What's a word for the final mixing and processing of already processed ingredients (specifically in the context of cooking)

I'm looking for a word which describes the act of putting all your ingredients together and cooking them one final time as a way to sort of finalize a meal.

An example is Lasagna. First you cook all the individual parts, but then the final step involves assembling the pieces together and baking them for a while so that the dish holds together better, the flavors mix a bit, and there's also some browning.

In the abstract, I'm thinking about the construction of objects which have many components that are processed individually then brought together for a final collective refinement. Is there a word for this last sort of finishing one does to a bunch of individually finished components?

P.S. I think another example of this, not from cooking, would be "mastering" in the context of music production. That is the final phase where all the tracks are brought together and made to sound like a more cohesive whole rather than a bunch of individual pieces.

Solution 1:

Finish: To complete the preparation of a dish for consumption. This may entail adjusting the seasoning or the consistency, adding garnish, or mounting a soup or sauce with butter or vinegar before service. [AtomicGourmet.com]

or

Compose: to make or form by combining things, parts, or elements: 'He composed his speech from many research notes.' In Art: to organize the parts or elements of (a picture or the like). [Dictionary.com]

or

Consolidate: to bring together (separate parts) into a single or unified whole; unite; combine: 'They consolidated their three companies.' [Dictionary.com]

Solution 2:

I believe you call that process "preparing a meal" (as a final & relatively quick process of assembling and optionally further cooking). An example can be preparing a sandwich from bread (already baked) and fillings (some of them already cooked or processed otherwise), and optionally grilling it.

ODO:

prepare VERB

1.2 Make (food or a meal) ready for cooking or eating:
‘she was busy preparing lunch’

‘Ticket holders have access to several stations where chefs prepare the food in woks and large sauté pans.’