Heat the oil in a large nonstick sauté pan over medium heat.
Add the onions and cook, stirring frequently, until they begin to brown, 6 minutes.
Add the ginger, garlic, cumin, turmeric, salt, cayenne pepper and cinnamon and cook, stirring constantly, until fragrant, 45 seconds.
Add the turkey and cook, breaking up the meat with a spatula, until cooked through, 8 minutes.
Add the peas, lime juice and garam masala and cook, stirring occasionally, until the peas are warmed through, 4 minutes.
Serve with the cauliflower or rice and a dollop of yogurt, if desired.
