|Nonfat mayonnaise||2 Tablespoon|
|Creamy mustard mayonnaise blend||2 Tablespoon|
|Canned albacore tuna||12 Ounce, drained, flaked (2 Cans, 6 1/8 Ounces Each)|
|Dry breadcrumbs||1⁄2 Cup (8 tbs), divided|
|Chopped green onions||1⁄4 Cup (4 tbs)|
|Vegetable cooking spray||1|
|Nonfat mayonnaise||1⁄4 Cup (4 tbs)|
|Hamburger buns||6 Ounce, split (1 1/2 Ounces Each)|
|Sweet onion slices||4|
Combine first 3 ingredients in a bowl; stir well.
Add tuna, 1/4 cup breadcrumbs, and green onions; stir well.
Divide mixture into 4 equal portions, shaping each into a 4-inch patty.
Press remaining breadcrumbs evenly onto both sides of patties.
Coat a large nonstick skillet with cooking spray; place skillet over medium-high heat until hot.
Add patties; cover and cook patties 3 minutes.
Carefully turn patties, and cook, uncovered, 3 minutes or until patties are golden.
Spread mayonnaise evenly on the bun tops and bottoms.
Place lettuce, tomato, onion, and patties on bottom halves of buns; place tops on sandwiches.