Place chicken breast in a large resealable bag or between sheets of wax paper and give them a good whack with the bottom of a pan or a rolling pin. Alternately, if they are coming out of the freezer and are still a bit icy, you could butterfly the breasts (and adjust the cooking time accordingly)
Mix the rest of the ingredients in a bowl - taste it, you'll melt!
I took each of my pieces of chicken and pulled them through the yogurt coating on either side. You could just dump it in the ziplock but I really wanted to keep as much of the coating as I could!
Place chicken breasts on a foil lined cookie sheet (so they aren't touching)
Bake for 30-35 minutes
Turn broil to high for about 2 minutes before I took them out so they got nice and toasty on the top.