Rinse broccolini and shake dry. Trim the tips of the broccolini.
Heat vegetable oil in a large pan over medium high heat. Add broccolini and 2 tablespoons water, stir fry until tender crisp, about 6-8 minutes.
Move the broccolini to one side of the pan and in the center add butter, garlic, soy sauce, & chili flakes if using. Cook until fragrant, about 30 seconds then mix together with broccolini.
Season with salt & pepper to taste and serve.
