In a large sauté pan, heat olive oil and sauté scallion and zucchini about 2 to 3 minutes.
Add dry white wine and allow to evaporate. Add frozen fava beans, salt and pepper, and cook on medium-low heat for about 20 minutes, stirring occasionally, adding a little vegetable broth or water, if necessary.
A couple of minutes before serving, add corn and a chopped basil leaves.
Serve as an accompaniment to Risotto with Lemon and Ricotta