2. Heat the olive oil in a large skillet and cook the onions and leek, stirring, over medium heat until soft, 5 to 7 minutes. Add the garlic, tomato paste, cayenne and paprika and stir for about 3 minutes. Add the wilted greens, dill, wild fennel leaves or mint leaves, and tomatoes. Simmer over low heat, uncovered, for about 20 minutes, until the greens are soft and all the pan liquids have cooked off. The dish should be fairly dry. Adjust the seasoning with salt and cayenne, and serve either hot or warm with fresh country bread. Pour a little fresh olive oil over the greens once they are cooked, if desired.