First, read the English article below.

Toss the ingredients together in a 2-qt (2-L) glass casserole dish with a loose lid. If desired, you can spray the dish with nonstick cooking spray first or wipe the bottom and sides down with butter to prevent the potatoes from sticking. In a small bowl, whisk together the flour and salt until well-combined.  All-purpose flour works best for this recipe. Use anywhere from 1 to 2 tsp (5 to 10 ml) salt. Evenly sprinkle the flour mixture over the potato mixture in your microwave-safe dish. Toss the vegetables gently to coat them with the flour and salt. You can use clean hands to toss the contents of the dish, but an easier and cleaner alternative is to use a fork to stir the ingredients together. Pour the milk over the potatoes in your dish, covering all the other ingredients evenly. Give the dish a gentle shake from side to side in order to distribute the milk more evenly and settle the contents of the dish. When done, the potatoes should be tender enough to pierce with a fork.  Cover the dish with a loose lid or clean paper towel to prevent splattering. Do not use a tight lid. Stir the contents of the dish every 5 minutes as the potatoes cook. If the microwave does not have a rotating tray, turn the dish 180 degrees during the middle of the cooking time so that all sides cook evenly. Let the potatoes rest for 5 minutes after they finish cooking. Sprinkle the parsley and paprika over the finished potatoes and enjoy. 

Now, please write a short abstract for it in Chinese. Abstract:
将土豆，洋葱和黄油在微波专用盘中摆放好。 分别加入面粉和盐。 将面粉混合物撒在土豆上。 在盘中倒入牛奶。 大火烧制15分钟。 上菜时加入欧芹和辣椒粉。