Roasted Garlic Mashed Potatoes with russet

8 medium russet potatoes 1 cup half-and-half cream 1/4 cup unsalted butter 1/4 roasted garlic 1/2 cup pesto sauce salt pepper 1 I like to dice my potatoes up[...]

3 heads garlic , top 1/2-inch cut away 3 tablespoons olive oil salt fresh ground black pepper 2 lbs baking potatoes , like russets or 2 lbs yukon gold[...]