Add the tzatziki ingredients to a blender and blend until smooth. Adjust seasoning if necessary and set aside.
Heat 1 tablespoon olive oil in a large skillet over medium heat. Add the lamb and stir occasionally for 2-3 minutes, breaking up the meat as it cooks. Next, add the garlic, thyme, oregano, salt, and pepper and stir to combine. Continue cooking the lamb until no longer pink, around 2-3 additional minutes.
At the same time as the lamb, in a second large skillet, heat remaining tablespoon of olive oil over medium heat. Add the Cauliflower Riced Veggies and stir to coat with the oil. Sprinkle with salt and pepper and saute until tender-crisp and lightly golden, around 5-6 minutes.
Assemble the bowls by adding the Cauliflower Riced Veggies first, then adding the cooked lamb, followed by the tomatoes, cucumber, and onions. Drizzle with Greek dressing, then top with the tzatziki and enjoy!
Notes
*to make the tzatziki paleo, substitute the Greek yogurt for ¼ cup full-fat coconut milk and ¼ cup paleo mayonnaise.