1 Medium (approx 2-3/4" long, 2-1/2 dia.) Red Bell Pepper
1 Can Tuna
1 Medium Cucumber
1 Tbsp Mustard
1 Tbsp Balsamic Vinega
Mix the tuna with the sliced cucumber and one tbsp of mustard.
Slice bell pepper in half and clean out seeds.
Fill both halves with mixture.