Originally Posted by SapInMyBlood

In my last solo fastpacking trip I did about 700km in 5 days. I stopped at grocery stores and picked up simple, easy to eat foods

Knowing I was doing a lot of fat fuelled endurance / aerobic work, I focused on fat, protein, salt (hydration) and a small amount of carbs

Dense, highly nutritionous and ideally cheap foods are what I focus on

For this trip it meant a 1kg dried sausage, 500g chunk of aged cheddar, a 1kg loaf of fruit loaf and a jar of peanut butter. 3kg of food for the majority of that trip

Easy to eat, easy to store, minimal cleanup (rinse knife or spoon) and I'm happy eating those basic foods for a long time.