Cook Mussels: In a pot, drizzle oil, add crushed garlic and parsley stalks, then add cleaned mussels. Heat and cover for a few minutes until they open.
Filter Mussel Liquid: Remove opened mussels and filter their liquid. Shell the mussels while still hot, covering them with their liquid to prevent drying.
Blanch Broad Beans: Blanch broad beans in boiling water for 2-3 minutes, then transfer to ice water. Shell the beans one by one.
Prepare Broth: Add mussel shells to the broad bean water to create a flavorful broth for the risotto.
Toast Rice: Dry toast the rice in a pan, stirring constantly. Once hot, deglaze with white wine and let it evaporate.
Cook Risotto: Begin adding warm broth to the rice, ensuring it is covered. Stir regularly.
Season Broad Beans: Season the shelled broad beans with pepper, salt, oil, lemon zest, lemon juice, and mint.
Finish Risotto: Halfway through cooking, add mussel water to the risotto, adjusting for saltiness. Once rice is al dente, add mussels, broad beans, butter, olive oil, parmesan, and pecorino.
Plate the Dish: Garnish with remaining broad beans, mussels, pepper, olive oil, and mint leaves. Serve hot.