Bring the oil to medium-high heat in a medium, heavy-bottomed pot with a tightly fitting lid. Add the prosciutto and crisp until it is lightly golden and the fat renders, about 1 minute. Add the carrots, peppers and onions and cook until softened, about 3 minutes. Stir in the orzo and rice. Toast until the grains are all evenly coated with oil, about 3 minutes.
Pour the broth and lemon juice into the same pot. Bring to a boil. Add the garbanzos and bay leaf and stir to combine. Cover, reduce the heat to medium-low and simmer until the orzo and rice are tender. Remove from the heat once the liquid is fully absorbed, 12 to 15 minutes.
Let the pilaf stand, covered, for 5 full minutes. Fluff with two forks, remove the bay leaf and season with salt and pepper. Stir in the scallions and serve garnished with the basil and mint leaves.
Recipe courtesy of Guy Fieri