Rinse spinach, dry, remove stems and damaged leaves. Divide the spinach leaves among 4 bowls. Peel the kiwi, cut into slices. Peel the papaya, cut in half, remove the seeds, carefully cut the pulp into cubes with a side of 1 cm. Wash the pepper, remove the seeds, cut into thin strips. Place papaya cubes and pepper strips in a salad bowl. Mix lemon juice, fish sauce and sugar. Finely chop the peeled ginger and add to the sauce. Pour the resulting dressing into a salad bowl with pepper and papaya, mix gently. Divide salad among bowls over spinach leaves. Brown the nuts in a pan without fat. Put the pieces of crab on the salad, sprinkle with fried nuts.