This makes 12 whole roasted heads of garlic. Per 1 tsp. of garlic (~1 large clove), it is 4 calories, 0.01g Fats, 0.83g Net Carbs, and 0.18g Protein. This does not include the olive oil.
Peel the outer layers of paper off of the garlic until you get to a point where you have to apply quite a bit of pressure to peel the "paper" skins off.
Preheat oven to 400F.
Cut 1/2 inch off the top of each garlic head. Place garlic in an oven safe container with foil underneath.
Drizzle 2 tsp. of olive oil per head of garlic - about 1/2 cup total.
Wrap foil around garlic tightly and bake for 35 minutes. Check the garlic and continue cooking in 10 minute intervals if needed.
When finished, garlic cloves should be a light golden color (some will be darker, this means they'll be softer).