Vegetable salad with tuna in 5 minutes

Very fast, and most importantly, tasty and healthy salad! It is easy to prepare and from simple products!
Ingredients:
Bulgarian pepper 1 pc.
Green onions 4 = 5 pcs.
Canned corn 200 gr.
Canned green peas 200 gr.
Canned tuna 150 gr.
Olive oil 30 gr.
Salt, pepper to taste
Juice of 1/2 lemon