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Open the canned tuna, drain the oil, place in a bowl, add mayonnaise and black pepper, and mix well.

An easy-to-make Tuna Mayo Rice Bowl recipe using canned tuna, mayonnaise, and eggs.
Open the canned tuna, drain the oil, place in a bowl, add mayonnaise and black pepper, and mix well.
Add sugar, water, and soy sauce to a pot, turn on the heat, and boil once to make the sauce.
Crack the egg into a pan and scramble it.
Place one serving of rice in a bowl and spread it out evenly with a spoon.
Top the rice with the scrambled egg, tuna, and sauce in order, then mix well.