A Business Idea - Could This Possibly Work?

First off, I would like to point out that I don't have an industry background, so please apologize if this comes across as totally dumb. But I'm intent on starting my own business, so I would like to explore this idea of mine.

I know nowadays, restaurants buy more and more premade stuff. But a lot of this is made by specialized manufacturers. So, I was wondering, couldn't restaurants compete with them and make their own stuff, both for their own use and to sell it to other restaurants? In every bigger town, there are areas where there is a restaurant on every corner. My line of thought was that in such places where restaurants are closely clustered, each could specialize in one type of intermediate product and sell it to the others in the same area. They way I see it, this would have at least two advantages:
- Many restaurants are only open around noon and in the evening. This way, they could generate additional income during off-hours.
-  Rather than ordering stuff from a manufacturing company that has to ship it all across town or even from another town, you would order it from another restaurant across the street or a couple blocks down the road - a lot less wasteful.

Where I would come in is, I would basically provide an online platform where restaurants could sign up and buy & sell from other restaurants in the area.

OK, to repeat, I am not a chef, nor have I ever worked in the culinary industry. My idea might be a total pipe dream, which is why I'm posting it on here. Hope somebody is kind enough to give me their insight on this.

Thanks!

Wow, thanks everyone! Was a bit afraid no-one was going to respond to this. Really appreciate your replies.

@phatch & @kuan, yeah, I get your point, makes sense. But I was also thinking about "intermediate" products (I don't know what the appropriate term for that is - the equivalent of "work in progress" in a factory). You know, like sauces or pie crusts or whatever. The final product will then not be exactly be the same. One restaurant may use the pie crust to make an apple pie, the other will bake a quiche. So, IMHO, in that case, there would still be room for differentiation.

@foodpump, yeah, I guess that's what I'm talking about. I did have a feeling that it was already being done. But as far as I can tell, there exists no central platform yet where restaurants could offer their products as you described. Do you think there would be demand for such an online market place? How do you market your food? Also, do you deliver yourself or do you use a courier?