Prepare the Dressing: In a small lidded jar or bowl, combine the fresh lemon juice, sumac, and dried mint. Seal the jar and shake (or whisk in the bowl) while slowly adding the olive oil until the dressing is emulsified. Season lightly with salt and pepper.
Prepare the Produce: On your cutting board, dice the Persian cucumbers into small, uniform pieces. Slice the cherry tomatoes into quarters.
Slice the Eggs: Gently slice each peeled, hard-cooked egg lengthwise into quarters, yielding four wedges per egg.
Assemble the Bowl Base: Divide the diced cucumbers and quartered tomatoes evenly among the three shallow serving bowls, creating a fresh vegetable base.
Arrange the Protein: Artfully arrange 8 egg wedges (the equivalent of 2 full eggs) over the vegetables in each bowl.
Dress and Garnish: Give the dressing one last shake and drizzle it evenly over the contents of each bowl. Finish with a generous sprinkle of crumbled feta cheese and chopped fresh mint. Serve immediately.