What about (sugar) snap peas? You eat the whole thing; crispy pods and fat peas. Those are my favorite, although I do rely on growing them myself.
Regarding frozen peas, I don’t recall having eaten them lately, but I recently saw a recipe for a smashed pea mezze in a Yotam Ottolenghi Master Class I might try.
ETA That reminds me; fava beans are also pretty in the garden, and tasty from the kitchen.
