Hi and welcome from the UK.
I have a dachshund cross who isn't food orientated at all (this made training a bit more difficult as even sausages wouldn't do the trick!
And a six month old dachshund who eats everything....and I mean EVERYTHING! she even tries to get the chewing gum off pavements, eats all the plants in the garden, loves coal if she can get it...in fact I haven't found anything she wont eat yet, so I have a feeling controlling her weight is going to be a problem for the future.
I love garyd's suggestion of the frozen beans.