Cucumber Tuna Rolls

 1 can (6.5 oz), drained Tuna in Water (Canned)

 1 stalk, medium (7-1/2" - 8" long) Celery

 1/2 cup, grated Carrots

 1/4 cup, chopped Onions

 1 serving (serving = 1 tsp) Maille Honey Dijon Mustard

 1/2 lemon yields Lemon Juice

 0.66 tbsp Parsley

 1 dash Black Pepper

 1/2 large (8-1/4" long) Cucumber (Peeled)