Slice the chicken breast into bite-sized pieces and toss in a small bowl with the cumin, smoked paprika, garlic powder, sea salt, and black pepper until evenly coated.
Heat the olive oil in a large non-stick skillet over medium-high heat and sear the chicken for 5-7 minutes, turning occasionally until golden brown and cooked through.
Remove the chicken from the skillet and add the cauliflower rice, sautéing for 3 minutes in the remaining juices until tender.
In a serving bowl, fluff the cooked quinoa and mix it with the sautéed cauliflower rice, fresh parsley, and half of the lemon juice.
Top the grain and veggie base with the crispy chicken, halved cherry tomatoes, and diced cucumbers.
In a small ramekin, whisk together the Greek yogurt, the remaining lemon juice, and fresh dill, then drizzle the sauce over the bowl before serving.