The ones I have been buying are called Don Don Instant Japanese - Styled Noodle (Udon) from Kwong Tai Agency Co., Ltd. The package contains 4 individual serving of 200 grams each. I haven`t tried other brands at home, though I have eaten udon a few times in restaurants, and enjoyed them equally as well.
There are some simple recipes on the back of the package and I adjusted on to my needs and ingredients at hand.
Heat a teaspoon of oil in a frying pan along with one packet of udon. Add a teaspoon of oyster sauce and about a tablespoon of sweet chili sauce for chicken. Stir fequently. Add whatever small cut vegetables and stir for a few minutes. I added a handful of bean sprouts. I then poured it into a flat bowl. Then I scrambled friend a beaten egg. I also added a handful of fresh greens into the serving dish, added the egg on top sprinkled with a bit of Sriracha sauce.
Simple yet so tasty.