Combine tuna, diced onion, red bell pepper, celery, egg, mayonnaise, lemon juice and dill weed in a bowl, mix well. Refrigerated one hour. Taste and season with salt and pepper.
Cut avocados in half, remove seed and peel carefully.
Use a spoon to stuff avocados with tuna salad filling.
Serve immediately on a bed of lettuce.
Notes
*For a spicierversion,stirin 1 tablespoonfinelydicedjalapenosintothetunamixture.