Use a spoon to hollow out the avocados, creating a bowl effect, leaving plenty of avocado to form edible bowl walls. Place scooped avocado into a mixing bowl and mash with a fork.
Drain tuna and place into mixing bowl with avocado. Add in lime juice, soy sauce, garlic, cilantro, green onions, peanuts, and red pepper flakes. Stir to combine.
Stuff into prepared avocado bowls.
Want it spicy? Drizzle with hot chili sauce and serve.