Season with salt and pepper and add to the beans.

Add linguine to pot and, a few minutes later, the beans.

Add them to the beans with the fresh mushrooms and cook 12 minutes.

Cut the tomatoes into quarters and add them to the beans with the onion.

Finely cut up the rest of the spring onion and add to the beans.

The meat may be sautéed along with the vegetables or added directly to the beans.

Add the paste to the beans and cook, stirring, for 15 minutes.

When the onion mixture is cooked, add it to the beans, and simmer 5 to 10 minutes.

Add this mixture to the beans and continue cooking.

Chop up the ham and add to the beans with the remaining butter.