In a small bowl, whisk together the vegetable broth, hoisin sauce, soy sauce and cornstarch. Set the mixture aside.
Place a large sauté pan or wok over medium-low heat. Add 2 tablespoons olive oil and and heat it for 1 minute. Add the garlic and ginger and cook for 2 minutes, stirring constantly.
Add the shrimp to the pan and cook, stirring as needed, until the shrimp are cooked throughout and pink on all sides, about 3 minutes. Season the shrimp with salt and pepper and then transfer them to a bowl, leaving any liquid in the pan.
Increase the heat to medium. Add the remaining 1 Tablespoon of olive oil to the pan, then add the bell pepper, carrots, red onions and snow peas and cook, stirring constantly, for 3 to 4 minutes until the vegetables are crisp but tender. Add the prepared sauce and cook, stirring constantly, for 2 minutes until the sauce thickens slightly. Return the shrimp to the pan, stirring to combine, then add the zucchini noodles and cook, tossing to coat, for 1 minute.
Transfer the stir-fry to serving plates, garnish with toasted sesame seeds and serve immediately.