Well.....ideas. Just make sure you eat something from all food groups and different coloured fruit and veg.
Fill the fridge with veggies that can be cut up as soon as you have the energy to do it (cut up a days supply only or it will dry out) and then leave it in tupperware or a bag in the fridge for you to pick from during the day - peppers, carrots, cucumber, sugar snap peas, cherry tomatoes - buy them from your local market - it will be much cheaper.
Pot of Humus for dipping
Cut up pack of flour tortillas in to triangles, lay on baking tray and bake until golden. cool and keep in airtight container. Really yummy if spread with grated cheese with pumpkin/sunflower seeds on the top before baking. Not sure how long those ones would store for though
Nibble on frozen peas
Do same with fruit - berries, apples, pears, plum, bananas, melon, grapes
Cook a whole chicken and then you can have it with baked potato and salad / sandwich / on it's own etc
Sticks of cheddar dipped in branston?
Smoothies? either bought or homemade
Soups - chop for 5 mins and throw in some stock then sit down for 30 mins then cool, blend & eat with toast.
Baked beans on toast?