I can never be bothered with cooking stuff.

1 loaf of bread
1 packet of wafer thin turkey ham
1 packet of salami or pepperoni
1 packet of light cheese slices
1 squirty thing of brown or bbq sauce
I just assemble a sandwich out of that lot as and when I feel like it.

Couple of bits of fruit as well
Breakfast biscuits for the morning
Beer.