I find couscous to be brilliant on tour!
I have it for breakfast with powdered milk, cinnamon and fruit & nuts - a little bit of luxury.
The pot is much easier to clean than with porridge. Works for lunch too! And great to have something quick & warm when it's cold & wet!
For dinner, add a stock cube to the hot water for flavour. Fry up a little chorizo or other dried meat & mix it in.
Noodles are good too, very light to carry, but mine break into little pieces in the panniers. Again, cook then with a stock cube for flavour. Or bring a little jar of pesto to liven them up.
Here in NL, I can get kidney beans in sauce in foil bags. They're great for adding to a base - couscous/pasta etc or with tuna in a tortilla.
Sometimes I'll bring self raising flour, mix it with water (& herbs if I have them) and make a simple flat bread. A little pesto, or some olive oil & rub a clove of garlic against it for extra flavour.
And I never leave home without hard-boiled eggs
Dark chocolate, fruit/nut mix is my go to snack.
Have a great trip!
Frank