Walnut Burger with Sweet Potato Ketchup (vegetarian)

    Ingredients

    For the Patty Base
    72 % chickpeas (canned, without liquid)
    8 % flour
    20 % cooked chestnuts
    salt
    pepper
    For the Walnut Patties
    64 % patty base
    36 % coarsley chopped walnuts
    For the Walnut Buns
    13 % walnut flour
    6 % buckwheat flour
    44 % wheat flour
    1 % vinegar
    2 % salt
    16 % water
    16 % dark beer (e.g. porter)
    2 % fresh yeast
    For the Sweet Potato Ketchup
    40 % sweet potatoes
    40 % sea salt
    8 % vegetable broth
    2 % shallots
    1 % garlic
    8 % white wine vinegar
    1 % olive oil
    salt
    pepper

    Description

    Recipe developed by Heiko Antoniewicz for the California Walnut Commission 2020.
     
    Application

    The walnut patties can be offered as chilled or frozen convenience product. The walnut buns are ideal for regeneration and the sweet potato ketchup as ready-made sauce in the bottle or glass jar.

    Preparation

    Patty Base

    Mix everything together in a blender until smooth and season.
     
    Walnut Patties

    Add chopped walnuts to the patty base and mix well. Shape into patties of approx. 150 g. Fry in olive oil until golden brown and keep warm in the oven at 70 °C.
     
    Walnut Buns

    Combine lukewarm water, yeast, salt, vinegar and beer. Add the remaining ingredients and knead for approx. 10-15 min. Proof dough at room temperature until it doubles, then shape into buns of approx. 110-120 g each and proof again for approx. 30 minutes. Bake buns at 190 °C. Combi Steam for 10 minutes and then at 220 °C for another 10 minutes.
     
    Sweet Potato Ketchup

    Cook sweet potatoes with the skin on sea salt in the oven at 160 °C for approx. 40-50 minutes until they are completely soft and close to caramelizing. Allow to cool for a while. Scrape the flesh out of the skin and put aside. Cook shallots and garlic with olive oil in a pot until soft and deglaze with white wine vinegar. Add vegetable broth and sweet potato pulp and bring to a boil once. Season with salt and pepper and puree in a blender to a fine-consistency ketchup.