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Heat oil in a large skillet; cook red onion until translucent. Add carrots, 3 tablespoons Worcestershire sauce, 1 tablespoon MAGGI Seasoning Sauce and habañero chile; cook for 5 minutes. Set aside.
For the hamburgers, mix together tuna, yellow onion, parsley, egg, zucchini, breadcrumbs, remaining 2 tablespoons Worcestershire sauce and remaining 1 1/2 tablespoons MAGGI Seasoning Sauce; form 4 patties and cook them in a pan on both sides. Top each with a slice of cheese; cover until melted.
Spread mayonnaise on hamburger buns; top with lettuce, tuna burgers, onion-carrot mixture and pineapple.