Heat a large skillet to medium high heat. Add ground turkey and brown. Drain. Add taco seasoning and water, stir. Reduce heat to low and cook a few minutes more. Set aside.
Meanwhile assemble medium jars starting with most wet ingredients at the bottom. Ingredients above are for four jars. Add 1 tbsp salsa to bottom of jar, then 1 tbsp plain Greek yogurt. Add pinch of cheese if using. Fill remaining space with spinach and seal with lid.
Divide taco meat among 4 smaller jars and seal with lid. Refrigerate up to one week.
When ready to heat, place taco meat in a microwave safe bowl for 60 seconds. Use fork to remove ingredients from larger jar and toss together.