Add pork to a medium bowl, season with salt and toss with cornstarch until coated.
In a separate bowl, whisk garlic, ginger, brown sugar, soy sauce, and pepper until blended; set aside.
In a large skillet over medium-high heat, heat 1 tsp oil. Cook broccoli, green beans and white parts of green onion until tender, about 2 minutes. Transfer to a plate.
Return skillet to high heat and add the remaining 1 tablespoon of oil. When the oil is almost smoking, add pork.
Cook pork until crispy and no longer pink, about 5 minutes.
Reduce heat to medium heat, then return vegetables and add half the sauce to the pan.
Stir quickly to coat pork and vegetables in glaze. (Watch carefully- sauce can burn due to the sugar) Add remaining half of the sauce until you reach your desired sauciness.
Garnish with green onions. Enjoy.
This recipe is a wonderful template to play around with. Try adding other vegetables you like, such as bell peppers, asparagus, snap peas, carrots or mushrooms, or try adjust the heat-level of the sauce by adding in your favorite hot sauce or chilies.