In a large skillet over medium heat, heat oil. When the oil is hot, stir in ground turkey.
Cook 5 minutes until browned.
In a large mixing bowl add turkey and mix the next 5 ingredients (sage through cauliflower) together.
Place mixture in an oil coated 9x13 inch baking pan and cover with cheese. Bake for 30 minutes until the cauliflower is tender and cheese is melted, and bubbly.