In a saucepan, add the green peas along with water and salt and bring to a boil over medium heat for 1-2 minutes.
Remove the peas from the heat and drain.
Place the peas in a large bowl.
Chop the cherry tomatoes and optional onion into small quarters.
Drain the water from the canned corn.
Peel the avocado and remove the seed. Chop the avocado into small pieces.
In a small bowl, lightly mash the avocado and combine with the olive oil, lemon juice, salt, pepper, and spices. (Does not need to be fully mashed.)
Combine peas with the canned corn, cherry tomatoes, avocado, and salad dressing, along with optional red onion.
Toss the salad and serve.