Clean the salad, wash, spin dry and possibly pluck smaller. Radishes clean, wash, grate dry and cut into thin slices. Halve avocados, remove seeds. Remove the flesh from the skin and cut into cubes. Wash lemon hot, grate dry, finely grate peel. Halve the lemon, squeeze one half (approx. 2 tbsp.) of the juice. Use the rest of the lemon for other purposes
Mix avocados with lemon juice and zest. Clean the chillies, cut lengthwise, wash and remove the seeds. Chop the pods finely and add to the avocados with the margarine. Mash everything with a fork.
Season with salt and pepper. Remove the crusts from the bread and roast the slices until golden brown. Cover 4 slices with approx. 1/4 of the cream, crabs, lettuce and radishes, cover with the remaining slices. Halve the sandwiches and arrange on plates