Model and Manager class, full project https://github.com/neungnarakjung/CookBook-Siri-Shortcuts-Example

CookBookDataManager.swift

struct Recipe: Codable {
    let identifier: String
    let name: String
    let instruction: [String]
}

protocol CookBookDataManager {
    func getRecipe(_ identifier: String) -> Recipe?
}

final class CookBookDataManagerImpl: CookBookDataManager {

    private lazy var recipes: [Recipe] = {
        return [
            Recipe(
                identifier: "foo",
                name: "Foo Bar",
                instruction: ["Foo", "Bar"]
            )
        ]
    }()

    func getRecipe(_ identifier: String) -> Recipe? {
        return recipes.filter{ $0.identifier == identifier }.first
    }
}