I burned the garlic pieces and used them anyway, you probably could just do the whole head of garlic in the oven and add the roasted garlic to the pesto recipe. (epicurious.com)
I love the roasted garlic flavor in this dish and used a whole large head of garlic in my version. (reciperebuild.com)
Cut top 1/4 inch off heads of garlic and remove loose skin. (nasoya.com)