The radiation left over from the Big Bang is the same as that in your microwave oven but very much less powerful. It would heat your pizza only to minus 271.3*C - not much good for defrosting the pizza let alone cooking it.
For 'The Haunting Hour ' I thought it would be a lot of fun. It was great to play this cool kid role. My episode is called 'The Intruders' and my character is this mean angry teenager because her younger brother was just born and he gets all of the attention. She's always playing tricks on her family and there are some cool twists.