Prep the produce. Chop parsley, cilantro, and half the red onion. Slice remaining onion. Halve tomatoes and dice cucumber.
Make the falafel mix. Pulse chickpeas, chopped onion, garlic, herbs, spices, baking powder, salt, pepper, and flour until coarse.
Rest the mixture 10 minutes to hydrate and firm up.
Shape 16 small patties with damp hands, pressing to compact.
Pan-fry the falafel. Heat olive oil in a skillet over medium. Cook patties 3–4 minutes per side until deeply golden.
Whisk the tahini sauce. Combine tahini, lemon juice, warm water, olive oil, minced garlic, salt, and cumin until smooth.
Warm the rice. Fluff with a fork.
Assemble bowls. Layer greens and rice. Add tomatoes, cucumber, sliced onion, olives, feta, and falafel. Drizzle with tahini sauce.