Fried egg sandwich on pita bread is good
Sweet potatoes cook very well in a microwave- about 8 or 9 minutes on high for a huge one that is a whole meal in itself. Add a little cooked chicken meat to it, and it's dinner- or breakfast. Or half for one and then the other. Sweet potatoes are very good for you. also, look for the bags of flash frozen chicken tenders. they cook very quickly and you can just take out what you need.
You can actually cook fish in a microwave- works for raw salmon or white fish like cod. Put it in a microwave safe dish with a little water for about 5 minutes, covered with one of those plastic covers or plastic wrap, and it's done! Cold salmon is great for breakfast, filled with protein and omega oils. Look for "fish pieces" at the market- they're just as good as the bigger pieces of fish, at less than half the price.
Hard boiled eggs are great to have around, because you can boil a bunch of them and keep them in the fridge just to have when you are hungry and don't have much time. they're also inexpensive protein. Leave the shells on until you're ready to eat them. dab on a little mustard or mayo or a little salt. YUM!
Greek yogurt is also a really good thing to have around. It's yummy with honey or maple syrup on it. It's great on cooked chicken (especially if you put some in a cup in the fridge with a little dill!). It's good for you, and will help keep your GI tract happy with extra good bacteria that tends to get low when you're under stress or not always eating right. But, it's actually good stuff too.
You can make anything into a taco, if you have some white corn tortillas. You can microwave one for 1 minute to make it crunchy, if you don't have a pan out.