Cup noodles can be made with cold water too. But they will take about 30 mins instead of 2-3 minutes. Tried and tested. They still taste good. They are not very nutritious, though.

I would recommended making Energy Bars/Balls. You can find a lot of recipes online but here's mine:

• Roasted almonds
• Roasted cashews
• Roasted pistachios
• Roasted hazelnuts
• Roasted walnuts
• Raisins
• Dates
• Dried Cranberries
• Peanut Butter (unsweetened) (mine contains coconut oil)
• Sesame seeds
• Muskmelon seeds
• Flax seeds
• Pumpkin seeds
• Dark Chocolate

1. Roast the nuts and grind almonds and walnuts to almost flour consistency, and grind the others coarsly.
2. Just put everything in a food processor and let it mix everything. You can also mix it with hand or spoon.
3. To make bars, just put the mixture in a baking dish or a tray and put as much pressure as you can on top of it with your hands or spoon to remove all the air pockets. Refrigerate it for 4 hours. Then cut it into bars.
4. To make balls, just lightly oil your hands and form a ball shape. Again, press them hard to remove the air pockets.

These can last over a week outside the refrigerator (considering the ambient temperature in your area does not rise above 30° C). And inside the refrigerator they can last for over a month.

You can add different types of seeds, nuts, sweeteners etc, depending on what you like, what your body needs and what's available.

Hope this helps.