Bring a pot of water to a boil for the noodles.
Heat a large skillet over medium-high heat with 2 tablespoons oil. Sauté asparagus and onions 2-3 minutes; add garlic, chili pepper, ginger, peas and fava beans or edamame. Toss to heat through, 2-3 minutes. Add sake or stock, and reduce heat to medium low.