Cook the grains: If you haven’t already, cook your chosen grain according to package directions. Fluff and let cool slightly so the greens don’t wilt too much.
Make the dressing: In a small jar, combine olive oil, lemon juice, zest, garlic, Dijon, oregano, honey (if using), salt, and pepper.
Shake until emulsified. Taste and adjust seasoning.
Prep the veggies: Halve tomatoes, chop cucumbers, thinly slice red onion, and roughly chop herbs. Pit and halve olives if needed.
Season the tuna: Flake the drained tuna into a bowl.
Toss with 1–2 tablespoons of the dressing and a pinch of salt and pepper. This wakes up the flavor.
Build the base: Divide grains among bowls. Add a handful of spinach or arugula to each.
Layer the toppings: Arrange tomatoes, cucumbers, red onion, olives, and tuna on top.
Add a generous spoonful of hummus to each bowl.
Finish and serve: Drizzle bowls with the remaining dressing. Sprinkle with feta and fresh herbs. Add any optional extras you love.
Serve right away.