Roasted garlic cloves will keep for up to a week when stored wrapped in the refrigerator.
To soften the cloves when you are ready to use them, pop them in the microwave for about 15-20 seconds.
Note regarding servings- There are, on average, 10 cloves of garlic in one heard of garlic. One clove is equal to one tbsp so 6 cloves would be 2 Tablespoons or one serving. Therefore, three heads of garlic should have 30 cloves equaling 5 servings.