Finely chop the onion. Peel the apples or leave the peel on, as you prefer. Core them and cut them into small cubes. Put the apple cubes into a saucepan with the sugar, balsamic vinegar, honey and a little salt. Simmer on medium heat for about 20 minutes. Season with chilli.
Peel and slice the potatoes, then cut them into very thin sticks. Dust with flour and salt. Briefly deep-fry in hot oil.
Put the minced meat in a bowl with the egg yolk, paprika, a dash of flour, salt and pepper. Mix well. Form the mass into burger patties.
Heat some oil in a frying pan. Fry the burger patties on both sides to the desired degree of doneness.
Set the patties aside, covered. Fry the speck slices in the same pan until they are crispy.
Cut the Vinschger Paarl bread in half lengthwise. Spread apple chutney on the bottom half of the bread and put a lettuce leaf and a patty on top. Add cheese, speck, tomato and another lettuce leaf. Cover with the top half of the bread. Serve the burger with the straw potatoes.
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