In a large resealable plastic bag, combine the first five ingredients; add salmon. Seal bag and turn to coat; refrigerate for 1 hour.
Drain and discard marinade. Place salmon in a food processor. Add bread crumbs; cover and process until blended. Shape into four patties; cover and refrigerate for 1 hour.
Using long-handled tongs, moisten a paper towel with cooking oil and lightly coat the grill rack. Grill patties, uncovered, over medium heat or broil 4 in. from the heat for 6-7 minutes. Turn and grill or broil 3-5 minutes longer or until a meat thermometer reads 140°.
Spread 1-1/2 teaspoons mayonnaise on each bun. Serve patties on buns with lettuce, tomato and onion. Yield: 4 servings.