Marinade Steak. Whisk 2 tablespoons chili crisp, 1 tablespoon rice vinegar, and 1 tablespoon vegetable oil together in a bowl; set aside. Pat steaks dry with paper towels and sprinkle with ¼ teaspoon table salt and ⅛ teaspoon pepper. Rub steaks all over with half of the chili crisp sauce. Set aside to let the steak come to room temperature and marinade.
Cook the rice noodles. Meanwhile, bring 2 quarts of water to boil. Remove from heat and add rice noodles, stir to seperate, then cover. Let noodles soak until soft and pliable but not fully tender, stirring once halfway through soaking, about 7 to 12 minutes. Drain noodles, then rinse with cold water until water runs clear. Shake to remove excess water. Sprinkle with 1 teaspoon rice vinegar
Pan fry the steak. Heat 1 tablespoon vegetable oil in a 10-inch cast iron or nonstick skillet over medium high heat until just smoking. Add steaks and cook until well browned and meat registers 120 to 125 ℉ (for medium-rare), 2 to 3 minutes per side. Transfer steaks to cutting board, tent loosly with aluminum foil, and let rest while cooking green beans.
Pan-fried green beans. Heat fat remaining in skillet over medium-high heat until shimmering. Stir in green beans, ⅛ teaspoon of sal and ⅛ a teaspoon pepper, cooking until spotty brown, 3 to 5 minutes. Add 2 tablespoons water, cover, and cook until beans are bright green and crisp-tender, about 2 minutes. Uncover and cook until water evaporates, another 1 to 2 minutes.
Toss everything together. Off heat, add noodles and 1 tablespoon chili crisp sauce to beans in skillet and toss to combine. Season with salt and pepper to taste. Slice steaks thin against the grain and serve with noodles. Garnish with pickled mushrooms.