Preparation Bring broth and water to a simmer in a small saucepan. Cook bacon in a small heavy saucepan over medium-low heat, stirring, until crisp. Transfer with a slotted spoon to a paper towel to drain. Add garlic to bacon fat in pan and cook, stirring occasionally, until pale golden, about 1 minute. Add rice, stirring to coat. Add 1/4 cup hot broth mixture and simmer briskly, stirring constantly, until broth is absorbed. Continue simmering and adding hot broth mixture, about 1/4 cup at a time, stirring frequently and letting each addition be absorbed before adding the next, until rice is just tender and creamy-looking but still al dente, 18 to 22 minutes. (Reserve leftover broth mixture.) Add peas and cook, stirring occasionally, 2 minutes. Stir in cheese, butter, zest, and juice. Thin risotto with some of reserved broth mixture if desired and season with salt and pepper. Top with bacon.
Preparation Bring broth and water to a simmer in a small saucepan. Cook bacon in a small heavy saucepan over medium-low heat, stirring, until crisp. Transfer with a slotted spoon to a paper towel to drain. Add garlic to bacon fat in pan and cook, stirring occasionally, until pale golden, about 1 minute. Add rice, stirring to coat. Add 1/4 cup hot broth mixture and simmer briskly, stirring constantly, until broth is absorbed. Continue simmering and adding hot broth mixture, about 1/4 cup at a time, stirring frequently and letting each addition be absorbed before adding the next, until rice is just tender and creamy-looking but still al dente, 18 to 22 minutes. (Reserve leftover broth mixture.) Add peas and cook, stirring occasionally, 2 minutes. Stir in cheese, butter, zest, and juice. Thin risotto with some of reserved broth mixture if desired and season with salt and pepper. Top with bacon.