Heat 2 teaspoons olive oil, in a non stick deep pan or wok. Use medium heat.
Cook the ground meat until no longer pink. Season with 1/2 teaspoon salt. About 5 to 6 minutes. Note: use medium to medium high heat. Transfer the cooked meat with any juices released to a bowl.
In the same pan, add the sesame oil and 1 to 1 1/2 tablespoon olive oil. Use medium heat.
Cook the onions, garlic and ginger for 2 minutes over medium heat. Season with a pinch of salt.
Add in the chopped hot peppers and crushed Szechuan peppercorns. Cook 30 to 60 seconds.
Add in the string beans and 1/2 of the chopped scallions. Season with a generous pinch or all of the remaining salt. Mix.
Add the cooked ground beef and soy sauce. Mix to combine with the beans. Cover pan with tight lid and cook for 8 to 10 minutes until beans are fork tender but still has a crunch. Note: Use medium-high to high heat. Turn off stove. Add in the basil leaves and 1/2 of the remaining scallions. Mix to combine.
Transfer to a serving bowl. Garnish with remaining scallions and slices of hot pepper if desired. Serve on top of a bed of brown or white rice. Enjoy.