Risotto with Peas and Ham

Name: Risotto with Peas and Ham
Ingredients: 6 1/2 cups low-sodium chicken broth; 2 cloves garlic; 4 tablespoons unsalted butter; 1 large leek (white and light green parts only), thinly sliced and rinsed well; 1 1/2 cups arborio rice; 1 cup dry white wine; 2 cups fresh or frozen peas (thawed if frozen); 8 ounces thickly sliced deli ham, cut into 1/4-inch cubes; 1/2 cup grated pecorino romano cheese (about 1 ounce), plus more for topping; Kosher salt and freshly ground pepper; Chopped fresh mint, for topping; Grated zest of 1 lemon