Zucchini Mushroom Stir Fry

4 cups of organic mushrooms
4 cups of organic chopped zucchini
2 cups chopped sweet onion
4 cups of organic spinach
3 tbsp. 100% grass-fed cultured butter (or ghee is even better if you make it yourself)
1 cup really raw cheddar bites

Melt butter/ghee in a large skillet on low.
Place onions in and let it saute for 10-15 minutes.
Add remaining ingredients except cheese and saute for 30 minutes.
Add cheese and turn off stove.