The head of garlic in your spice cabinet is starting to sprout, can you still use it?
Yes, but use it up soon. The green sprout is sign that the garlic is getting old, which equals rubbery cloves and deteriorating flavor.
What about the sprout? While the sprout is safe to eat, it can be better, so remove it prior to using the garlic in salsas or dressings. You can use in sauteed or roasted dishes, the heat will mellow the bitterness.
Always remember to store fresh garlic in a cool, dark, dry place - never in the fridge.