As soon as Pastéis de Nata went on the dessert menu at Adega restaurant in San Jose, the requests started pouring in for these Portuguese custards.

Hundreds of Bay Area residents wanted to know if they could stop by to purchase them.

On Saturday, fans can. Pastry chef Jessica Carreira’s treats will be sold from 11 a.m. to 2 p.m., or until supplies run out. A box of six Pastéis de Nata will cost $24.

“To the best of my knowledge, we are the only place in the Bay Area baking these specific authentic Pastéis de Nata as per the original Portuguese recipe,” said Adega co-owner Carlos Carreira, who is Jessica’s father.

“It’s a surprisingly simple recipe with few ingredients — including flour, eggs, sugar, lemon, cinnamon — but extremely difficult to execute. Chef Jessica stubbornly took three years to perfect the recipe that she learned while working in Portugal because she wanted to provide a consistent product that tastes just like it would in Portugal.”

If you want to reheat the custards, five minutes in the oven should do the trick. (“Never in the microwave,” the chef says.)

Can’t make it to Saturday’s sale? You may get other opportunities. “Depending on the success of this Saturday pop-up we might make it a weekly event,” Carlos Carreira said.

The custard also remains on the restaurant’s dessert menu.

Details: Adega is located at 1614 Alum Rock Ave. in San Jose’s Little Portugal neighborhood. www.adegarest.com