What food is safe to eat for someone with nut allergies

A simple web search provided this info:
Food Allergy Chef Cards: https://www.foodallergy.org/resources/food-allergy-chef-cards
Traveling to Spain With Food Allergies (pdf): https://www.foodallergy.org/resources/travel-tips-spain
(This link either opens a pdf file or downloads it to your computer)

You may find it’s much easier in Spain than in the US to identify allergens in foods. There was a law passed in the EU several years ago that requires restaurants to list any of 14 allergens (including nuts) that a menu item contains. You’ll see symbols on the menus, along with a legend identifying the allergens. Of course, you want to double check with the server.

Romesco sauce contains almonds and/or hazelnuts which might not be obvious for a usually smooth red sauce.

Hi I can understand the stress of traveling in foreign lands with a food allergy. Nuts are a key ingredient in Spanish cuisine, especially almonds, from savory to sweet, snacks to even drinks. Many times chopped almonds (almendras) can be used as a garnish. Definitely show a card with "Mi hija es alergica a los cacahuetes y las nueces" or something along those lines. In Spain a number of local people have allergies to nuts as well so it is not a unreasonable thing to say.

I'd suggest staying away from:
Turron (only during Christmas)
Gazpacho
Horchata
Patatas bravas
Polvorones
Marzipan
Romesco sauce
Salsa de Almendra
Suquet De Peix

Of course there are more dishes, but these are the main ones I know

My daughter is also allergic to tree nuts. She travelled solo in Spain and Portugal for 3 weeks without any problem. As others have noted, EU labelling laws require the listing of all allergens whether at a restaurant or on a grocery store item. It's very easy to understand what does and does not contain an allergen.

Regarding menus in Spain, in more "local" establishments many times the menu items of the day are just written on a blackboard or on a little piece of paper, what ever is fresh and seasonal, so do not rely on clear allergy information on menus for more informal local places like tapas bars. Best is always to ask.

Sometimes there can be surprises though. I ordered a cheese pizza in Sahagun and it came out to the table with walnuts on it. (they were under the cheese) The mgr. shrugged his shoulders when I told him I could not eat walnuts. Not allergic, but my body doesn't care for them. A cheese pizza was the last place I expected to find walnuts and this was not listed on the menu.