Grease 13 x 9 baking dish. Bring cream & 6 cups of chicken broth to a boil, stir in grits & cook over medium heat until they return to a boil. Reduce to a simmer, cover & cook for 25-30 minutes, stirring occasionally. Add milk if needed to cook to desire consistency (should resemble slightly runny oatmeal when finished).
Cook collards in remaining 2 cups of chicken broth for 10 minutes. Drain & blot dry with paper towel to remove excess water. Add butter & cheese to grits, stir until butter & cheese melt. Stir in collards. Place in casserole dish, top with crumbled bacon. Bake @ 350 degrees until lightly brown on top.