Add the mayonnaise and fresh lemon juice to a medium bowl. Whisk or stir until completely smooth and evenly combined.
1/2 cup mayonnaise, 1 tablespoon fresh lemon juice
Taste and season with salt, adjusting to your preference. Transfer to a small serving bowl or spread directly onto your burgers, sandwiches, or wraps. Refrigerate any leftovers in a sealed container immediately.
1 pinch salt
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Notes
Storage: Keep in a sealed container in the fridge for up to 5 days. Give it a stir before using if it has been sitting for more than a day.Make-Ahead: The flavour actually improves after a few hours as the lemon and salt settle into the mayo. Make a double batch on Sunday for the week.Freezing: Do not freeze — mayo-based sauces break when thawed, turning grainy and separated.Substitution: Greek yogurt can replace half the mayo for a lighter, tangier version. Bottled lemon juice works but fresh is noticeably brighter.Pro Tip: Mix in a bowl rather than directly on the bun. This lets the salt dissolve evenly into the sauce instead of hitting in random sharp bursts.