Stir-fry all vegetables, add the sauce and a bit of water, and simmer. Before it cools, add the tuna and mix well.
Wash the chili peppers thoroughly and slice them thinly.
Drain the tuna from the can.
Combine the tuna and chili peppers in a bowl and mix well.
Add mayonnaise, a little soy sauce, and pepper, then mix thoroughly.
Serve the completed spicy tuna in a bowl.