Potatoes Braised in Butter and Sake

this recipe was recommended by my sister, and is from "Sundays at Moosewood Restaurant." It's super simple, and really really tasty.

• 4 medium potatoes (starchy ones, like russet)
• 2 tbsp butter
• 1/2 cup sake (filtered)
• 2 tbsp tamari or other soy sauce

1. Peel and chop potatoes into large chunks. Cover with water and boil until ender (about 10 min.) Drain.

2. Melt the butter in a heavy skillet. Add the potatoes and gently toss until each piece is coated with butter. Add the sake and cook on high heat, uncovered, stirring regularly, until the sake has almost evaporated. Add the tamari sauce. Lower the heat and continue to cook about 5 minutes, stirring occasionally, until the potatoes are covered with a thick, brown sauce.
Serve hot.