To prepare the beans, slit open each pod and remove the actual bean. (You should have around 1½ cups beans.) Bring a medium pot of water to boil. Add the beans and cook for 2 minutes, just until they turn bright green and plump up a little. Drain and rinse with cold water to stop the cooking process.
To prepare the sprouts, cut each sprout in half vertically (from the top down to the stem). Place cut side down on a cutting board then thinly slice. The sprouts should naturally begin to separate into shreds. Place in a bowl and toss with your fingers to help the sprouts separate into shreds.
In a large skillet, heat the oil over medium heat. Add the garlic and cook for 2 minutes, stirring frequently. Add the sprouts and continue to cook, stirring constantly, until they barely begin to soften and turn bright green, 2-3 minutes. Toss in the reserved fava beans and stir just to heat through. Remove from heat.
Sprinkle with the lemon zest, juice, and salt. Stir to combine and serve.