Wash potatoes thoroughly and cook in boiling water for 20-30 minutes. Peel the beans and blanch in boiling salted water for about 3 minutes. Drain, rinse with cold water and let drain.
Drain the potatoes and rinse with cold water. Squeeze the beans out of the skin. Cook in boiling salted water for another 5 minutes, then drain. Cut the "lid" off the bell pepper. Remove the core.
Wash the peppers and cut into rings. Peel and slice the potatoes. Peel the skin from the chorizo and cut the sausage into slices. Heat 1 tablespoon of oil in a pan. Fry the chorizo and potatoes for about 4 minutes.
Wash sage, dab dry and pluck leaves from the stems. Coarsely chop larger leaves. Add the beans, peppers and sage to the pan and continue frying for 1-2 minutes. Deglaze with vinegar, stir in 3 tablespoons of olive oil and toss briefly.
Season to taste with salt and pepper. Arrange in bowls, let cool lukewarm and sprinkle with sea salt.