Boil 6 eggs hard for about 10 minutes. For the mincing mass peel and finely dice the onion. Cut the sausages lengthwise and remove the sausage meat. Knead sausage meat, minced meat, 1 egg, breadcrumbs, mustard and 4 tablespoons of water.
Season with about 1 level teaspoon each of salt and pepper.
Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Line baking tray with baking paper. Quench eggs cold. Drain cucumber salad in a sieve.
Braid bacon strips on a piece of baking paper to form a rectangle (approx. 35 x 45 cm). Spread the chopping mass on baking paper, turn over onto the bacon grid, remove the paper. Cover with cheese, then spread the cucumber salad on top.
Peel the eggs and lay them down in the lower quarter on one long side in a row. Cover with the minced bacon mixture and form into a roll.
Place the roll on the baking tray with the seam facing down. Bake in a hot oven for approx. 1 1⁄2 hours. Take the chopping roll out of the oven, cover with aluminium foil and let it rest for about 10 minutes. Cut into slices, arrange.
Served with green salad.