INGREDIENTS
1
green onion
3 Tbsps
fresh flat-leaf parsley
2 Tbsps
fresh tarragon leaves
1
lemon zest
2 tsp
lemon juice
1 tsp
dijon mustard
1/8 tsp
black pepper
1/3 cup
mayonnaise
12 oz
solid white tuna packed in water
4 inches
bread
1
tomato
1 cup
sharp cheddar cheese
2 Tbsps
butter