In a small bowl, combine the Greek yogurt, grated cucumber, lemon juice, and fresh dill to create the tzatziki sauce. Set aside in the refrigerator.
Heat the olive oil in a skillet over medium-high heat.
Add the ground lamb to the skillet, breaking it up with a spoon. Season with dried oregano, garlic powder, sea salt, and black pepper.
Cook the lamb until browned and cooked through, approximately 6-8 minutes, then remove from the pan and drain any excess fat.
In the same skillet or a separate pan, lightly sauté the cauliflower rice for 3-4 minutes until tender.
Assemble the bowl by placing the cauliflower rice at the base.
Top with the cooked lamb, chickpeas, cherry tomatoes, and red onion.
Finish the dish with a generous dollop of the prepared tzatziki sauce.