Tofu - If tofu is packaged in water, press out liquid first, like in this video. Then slice into 1/2” / 1.3 cm thick cubes. (Can be done 1 day ahead)
Make marinade - Whisk together Jerk seasoning, brown sugar, cinnamon, soy sauce, vinegar (portion for tofu), and first portion of cooking oil. (Can be done up to 5 days ahead)
Marinate tofu - Combine tofu with marinade. Marinate for at least 20 minutes and up to 2 days. (Can be done 2 days ahead)
Make vinaigrette - Whisk together lime juice, vinegar (portion for vinaigrette), mustard, cumin, and honey. Add olive oil while whisking. Season with some salt. (Can be done up to 5 days ahead)
Bell peppers - Chop bell peppers. (Can be done up to 5 days ahead)
Remove tofu from marinade (discard marinade). Season tofu with some salt and pepper.
Heat a nonstick pan or skillet with second portion of cooking oil. Add tofu and saute on all sides until golden brown, 8 to 10 minutes total.
Toss romaine, cucumbers, bell peppers, mangos, avocados, and green onions with vinaigrette until dressed to your liking. Top with tofu and crumbled plantain chips. Enjoy!