Cook the rice noodles according to the package directions. Drain and set aside.
Thinly slice the garlic and grate the ginger.
Cut the zucchini into half-moons, slice the bell pepper into thin strips, and divide the broccoli into bite-sized florets.
Heat the oil in a large skillet or wok over medium heat.
Add the garlic and ginger and cook for about 2 minutes, stirring frequently so the garlic doesn't burn.
Add the zucchini, broccoli, bell pepper, and edamame.
Pour in the soy sauce and 1/3 cup water. Cover and cook until the vegetables are tender but still slightly crisp.
Meanwhile, whisk the cornstarch with 1/2 cup cold water until completely smooth.
Pour the slurry into the pan and bring to a simmer, stirring until the sauce thickens.
Add the cooked rice noodles and toss everything together until evenly coated.
Serve immediately.