Combine the satay sauce, coconut milk, soy and sugar together. Set aside. Spoon 1 ½ tablespoons oil over the beef and stir to coat.
Put peanuts into the wok and place over high heat, stir-fry until peanuts are toasted. Remove to a plate. Wipe wok clean and heat over high heat until very hot. Cook the beef, in batches, for 2 minutes or until browned. Remove to a clean plate. Add the remaining oil with the Broccolini® and mini caps, stir-fry for 2 minutes. Add the satay mixture and bring to the boil. Return the beef and stir-fry until warmed though. Remove from the heat.
Divide between serving plates, scatter over the herbs and peanuts. Serve with lime and rice or noodles.