Wash the kale thoroughly and pluck into bite-sized pieces. Cook in boiling salted water for 15-20 minutes. Pour onto a sieve and drain. Roast pine nuts in a pan without fat, remove.
Peel and finely chop the onion. Wash the tomatoes, grate dry and cut in half. Fry ham in a pan without fat until crispy, remove. Add oil to the frying fat, heat up, fry onion in it.
Add the kale and tomatoes and braise briefly. Stir in vinegar, mustard and honey. Season to taste with salt and pepper. Add bacon and pine nuts and arrange on plates. Sprinkle parmesan slices over them.