This is a great fix for the period right before grocery day; if you've got a can of chickpeas on hand, you've got a quick and easy snack!
In a bowl, mix the garbanzo beans, onion, lemon juice, garlic, oregano, salt, black pepper, and cayenne pepper. Stir in the olive oil, and adjust seasonings to taste. Mix in the peas. Cover, and marinate in the refrigerator at least 1 hour.