Leftovers are simplest, but when I don't have them available, and am (like you) sick of tuna, I usually bring stuff like: --peanut-butter sandwich on whole-wheat bread --hummus and pita bread --cottage cheese --yogurt
Sometimes, when I'm mentally organized, I'll use an occasion when I'm in the kitchen cooking anyway to whip up some simpleminded burritos (canned pinto beans mooshed up with sauteed onion/garlic, a little pureed chipotle, cumin, red pepper flakes, cheese, wrapped in tortillas). Then I stick them in the freezer and pull one out as I'm heading out the door, and microwave it at work.
no subject
--peanut-butter sandwich on whole-wheat bread
--hummus and pita bread
--cottage cheese
--yogurt
Sometimes, when I'm mentally organized, I'll use an occasion when I'm in the kitchen cooking anyway to whip up some simpleminded burritos (canned pinto beans mooshed up with sauteed onion/garlic, a little pureed chipotle, cumin, red pepper flakes, cheese, wrapped in tortillas). Then I stick them in the freezer and pull one out as I'm heading out the door, and microwave it at work.