the easiest thing to make would probably be those dishes that are all cooked in a single pan/pot... from my own experience... teriyaki stir fry is the simplest thing..
ingredients:
beef/chicken/shrimp (cut into cubes or strips)
vegetables (i like to use napa cabbage [sui choy], bean sprouts, white onions, carrots and broccoli)
oyster sauce
salt
pepper
teriyaki sauce (store bought.. can be made but who really has THAT much effort? =])
oil (i don't use tons of this... nonstick pans are your friends)
directions:
boil the vegetables (except onions) till they start to float, signifying that they are done.... drain and put aside. (note: bean sprouts should be added to the boiled water last... they only need to be in the water for like 1 min, other vegetables i used need to be boiled approximately 5-6 mins...... if you over boil any vegetable they get mushy... edible but not as good)
if using chicken/beef, put into a bowl and enough oyster sauce to coat the meat evenly and let sit for 5 min.(skip this step if just shrimp) = this step tenderizes the meat

heat oil in a large pan with white onions (i like to put fresh minced garlic in too if i don't have any then garlic powder works, but will be added in a later step) and stir until fragrant...
-if cooking with shrimp, add shrimp into heated pan with a little bit of oyster sauce
-if cooking with chicken/beef, just stir fry until almost fully cooked
add boiled vegetables and stir in with meat/shrimp
add a pinch of salt and pepper (and a pinch of garlic powder, if desired)
finally, add some teriyaki sauce (amount will vary depending on the sauce that was bought.. but typically about a tablespoon is sufficient) and stir.. make sure you taste it to ensure readiness...
if you want more teriyaki sauce.. in a small pot... add 1 part teriyaki sauce to 1 part water (so 1 tsp sauce + 1 tsp water.. etc) and boil till you have slightly thicker consistency.... i add water to reduce the salt intake (anatomy lesson = more salt in body.. more water in body = increased water weight) without sacrificing too much for taste.. but if you're not an aging, slow metabolizing woman who would otherwise not care for salt intake

... by all means just warm up the teriyaki sauce straight....
DONE! serve with rice....
i like this recipe because it is quick (10 min! meal) and
can be healthy if you load on the vegetables...if you are vegetarian... tofu can be replaced in this entire recipe in place of the shrimp and vegetarian oyster sauce can be bought

hope this helps.. =)
living with someone who has no discernible cooking skills.... helps build cooking skills... haha.. for me anyways..