Friends are here from Latin America and I’m running errands for them while they’re off doing business. One of the things they asked for that they can’t get at home is “bread machine yeast.” They told me it comes in small jars. I haven’t been able to find it in my local markets and would like to know what can be substituted for it. Is it a rapid rise yeast? An instant yeast? An active dry yeast? Does it matter?