LINCOLN, NEB. ? Oven-baked Reuben sandwiches and fresh pastries soon will be on the menu at a McDonald’s restaurant.

That’s the plan for the so-called 3’n1 restaurant that will be test-marketed in Lincoln, Neb., starting Tuesday.

The name refers to the three distinct separate restaurants under one roof. It will have the regular McDonald’s, complete with traditional fare like Big Macs and fries, along with a sandwich shop and a bakery and treat area.

The goal is to add another dimension to McDonald’s traditional offerings, said Tom Ryan, executive vice president and chief concepts officer for the fast-food giant based in Oak Brook, Ill.

McDonald’s hasn’t been shy about trying new approaches to beef up domestic sales whose growth has shrunk.

There is no timeline for determining the success of the concept or whether it will be expanded outside Lincoln, Ryan said.

McDonald’s operates 13,000 domestic restaurants, including four in Lawrence.