2Heat a large, oven-safe skillet over medium heat. Add the oil. When it glistens, add the chopped onion and broccoli. Cover and cook, stirring occasionally, for 3-4 minutes to let the veggies soften. If the veggies appear too dry, add a splash of water or chicken broth.
3Stir in the chopped spinach, salt, pepper, chili powder, and pre-cooked chicken.
4Transfer chicken and veggie mixture to a casserole dish.
5In a bowl, whisk together the Greek yogurt and enchilada sauce, then pour over casserole dish. Top with cheese blend.
6Transfer to the oven and heat for 10–15 minutes or until the cheese is melted.
7Let it rest for 5 minutes, then top with cilantro, avocado, and jalapeno.