Clean and chop or tear greens into a large mixing bowl. Add parsley and mint.
Cut peaches in half and twist gently to loosen from stone pit. Slice or chop peaches and add to bowl.
Clean fresh ears of corn. Cut kernels from cob and add to bowl.
Thinly slice and then add red onion.
Top salad with crumbled feta.
In a jar, mix lemon juice, vinegar, oil, and salt. Shake vigorously and pour over salad just before serving.