This easy and delicious low-carb cucumber sub is a fresh, crunchy, and healthy alternative to traditional sandwiches. Perfect for a quick lunch or light dinner, these keto-friendly subs are packed with turkey, cheese, and crisp veggies. You can swap the fillings with your favorite ingredients, making them super flexible and satisfying for any meal!
Ingredients Needed
- 2 large cucumbers
- 8 tsp (2 tbsp + 2 tsp) mayonnaise
- 2 medium Roma tomatoes, sliced
- 4 leaves lettuce
- 4 oz (115g) turkey slices
- 4 slices provolone cheese
How To Make Low Carb Keto Cucumber Subs
- Prepare the cucumbers: Cut off both ends of each cucumber. Slice them in half lengthwise and use a spoon to remove the seeds. Then, cut each piece in half to shorten them.
- Spread the mayonnaise: Spread 1 teaspoon of mayonnaise inside each cucumber half (8 total).
- Assemble the subs: Place lettuce, tomato slices, a folded slice of provolone, and 2 turkey slices inside one cucumber half. Roll up a 3rd turkey slice and place it into the other half to fit inside.
- Close the sub: Press the second half over the filled one to form a sandwich.
- Repeat: Follow the same steps with the remaining cucumbers to make 4 subs in total.

Recipe Tips
- Use firm cucumbers: Pick fresh, firm cucumbers so they hold their shape and don’t get soggy. Avoid soft or overly ripe ones.
- Scoop out enough seeds: Make sure to remove all the seeds so there’s enough space for the fillings and the subs don’t get watery.
- Dry the inside: After scooping, pat the inside dry with a paper towel to keep the fillings from slipping out.
- Layer ingredients evenly: Place the lettuce first to create a barrier, preventing the cucumbers from getting too wet from the tomatoes.
- Secure with toothpicks if needed: If the subs don’t stay closed, use toothpicks to hold them together before serving.
How To Store Leftovers?
- Refrigerate: Place the cucumber subs in an airtight container and store them in the fridge for up to 1 day. Since cucumbers release water, it’s best to eat them fresh. If making ahead, keep the fillings separate and assemble before eating.
Nutrition Facts
Serving Size: 1 sub (recipe makes 4 servings)
- Calories: 204
- Total Fat: 14g
- Saturated Fat: 6g
- Cholesterol: 40mg
- Sodium: 500mg
- Potassium: 250mg
- Total Carbohydrate: 5g
- Dietary Fiber: 1g
- Sugars: 3g
- Protein: 13g
Check out More Recipes:
- Low Carb Keto Cold Crab Dip
- Low Carb Keto Cheese Sauce Recipe
- Low Carb Keto Fathead Dinner Rolls Recipe

Low Carb Keto Cucumber Subs Recipe
Description
This easy and delicious low-carb cucumber sub is a fresh, crunchy, and healthy alternative to traditional sandwiches. Perfect for a quick lunch or light dinner, these keto-friendly subs are packed with turkey, cheese, and crisp veggies. You can swap the fillings with your favorite ingredients, making them super flexible and satisfying for any meal!
Ingredients
Instructions
- Prepare the cucumbers: Cut off both ends of each cucumber. Slice them in half lengthwise and use a spoon to remove the seeds. Then, cut each piece in half to shorten them.
- Spread the mayonnaise: Spread 1 teaspoon of mayonnaise inside each cucumber half (8 total).
- Assemble the subs: Place lettuce, tomato slices, a folded slice of provolone, and 2 turkey slices inside one cucumber half. Roll up a 3rd turkey slice and place it into the other half to fit inside.
- Close the sub: Press the second half over the filled one to form a sandwich.
- Repeat: Follow the same steps with the remaining cucumbers to make 4 subs in total.
Notes
- Use firm cucumbers: Pick fresh, firm cucumbers so they hold their shape and don’t get soggy. Avoid soft or overly ripe ones.
- Scoop out enough seeds: Make sure to remove all the seeds so there’s enough space for the fillings and the subs don’t get watery.
- Dry the inside: After scooping, pat the inside dry with a paper towel to keep the fillings from slipping out.
- Layer ingredients evenly: Place the lettuce first to create a barrier, preventing the cucumbers from getting too wet from the tomatoes.
- Secure with toothpicks if needed: If the subs don’t stay closed, use toothpicks to hold them together before serving.