These low carb 3-ingredient tuna celery boats are my kind of crunchy lunch: simple, cool, and satisfying. They’re inspired by the way my mom used to pack crisp, cold celery sticks stuffed with tuna salad into our lunchboxes on warm Midwestern afternoons. The combination of snappy celery and creamy tuna-mayo feels nostalgic, but it also happens to fit neatly into a low-carb, high-protein way of eating. With only three ingredients and no cooking, this is a practical recipe for busy days when you want something refreshing, filling, and fast.
Serve these tuna celery boats straight from the fridge on a foil-lined tray for easy cleanup. They pair nicely with a few cherry tomatoes or sliced cucumbers on the side to keep the meal light and crunchy. If you’d like a bit more substance while staying low carb, add a hard-boiled egg or a small handful of olives. For those not counting carbs, a few whole-grain crackers or a small piece of fruit rounds out the plate without overshadowing the clean, cool flavors of the celery and tuna.
Low Carb 3-Ingredient Tuna Celery BoatsServings: 2-3
Ingredients
1 (5-ounce) can tuna in water, drained well
3 tablespoons mayonnaise
6 large celery stalks, ends trimmed and strings removed
Directions
Line a small serving tray or shallow dish with aluminum foil; this makes cleanup easy and gives you a place to arrange the filled celery boats, just like an old-school lunchbox spread.
Prepare the celery by washing the stalks under cool running water and patting them completely dry with a clean towel. Trim off the leafy tops and the base. If the stalks have tough strings, gently pull them off with a paring knife or your fingers so the bite is clean and crisp.
Cut each celery stalk in half crosswise to create shorter, snackable pieces with a natural hollow for the filling. Set the pieces aside on the foil-lined tray, hollow side up.
In a small mixing bowl, add the well-drained tuna and break it up with a fork into fine flakes. This helps it combine evenly and gives you that light, creamy texture rather than big dense chunks.
Add the mayonnaise to the tuna and mix thoroughly until the tuna is evenly coated and the mixture looks creamy and cohesive. Taste and, if you like, adjust with a tiny pinch of salt or pepper, but keep in mind the classic three-ingredient spirit of the recipe.
Using a spoon, generously stuff each celery piece with the tuna-mayo mixture, pressing it lightly into the hollow and mounding it just a bit over the top. You want the bright green celery edges to frame the pale, creamy filling.
Arrange the filled celery boats snugly on the foil-lined tray in a single layer. Cover loosely with plastic wrap and chill in the refrigerator for at least 15–20 minutes before serving so the celery stays cold and crisp and the flavors come together.
Serve the tuna celery boats cold, straight from the tray. Eat by hand like a snack or light lunch, enjoying the contrast between the crunchy celery and the smooth, savory tuna filling.
Variations & Tips
For a slightly different texture while staying within the three-ingredient framework, you can choose tuna packed in olive oil instead of water and reduce the mayonnaise by a spoonful for a richer flavor. If you’re not strictly limiting ingredients, a squeeze of lemon juice, a pinch of black pepper, or a sprinkle of dried dill brightens the filling nicely. For kids, you can cut the celery into shorter, bite-size pieces to make them easier to handle, or lightly mash the tuna mixture to an ultra-smooth consistency. To prep ahead, you can make the tuna-mayo mixture up to 2 days in advance and store it in an airtight container in the refrigerator; for the best crunch, fill the celery sticks within a few hours of serving. Food safety tips: Always keep tuna and mayonnaise-based fillings refrigerated at or below 40°F (4°C) and avoid leaving the filled celery at room temperature for more than 2 hours (or 1 hour if it’s very warm). Use tuna by its expiration date, and once opened, don’t keep leftover tuna salad longer than 3 days in the fridge. If you’re packing these for lunch on a warm day, tuck an ice pack alongside the container to keep everything safely chilled and as crisp as those nostalgic, mom-packed afternoon snacks.
