Five Easy Lunches Under 400 Calories That Start with a Can of Tuna — Recipe Equations

Welcome to Recipe Equation, the home of Kitchn's easiest 5-ingredient meals. Don't worry, this is the kind of math you'll enjoy — simply add up the ingredients for a quick solution to breakfast, lunch, or dinner.

A can of tuna is like the little black dress of the pantry. Classic and understated on its own, it becomes almost unrecognizable when dressed up with a few smart accessories. We recently took the budget-friendly fish for a spin in our lunch boxes and came out with five (five-ingredient) lunch equations that clock in at fewer than 400 calories.

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