Depending your budget and space, your outdoor kitchen Layout can include:
A sink; you can either drain it into your main waste line, or into a purpose build waste system. It isn't difficult. Consider a traditional stone sink -- they look great.
Prep Space; make sure you have enough space for preparing your pizzas and other food. It should be near the sink and the oven.
A refrigerator; keep the food you will be cooking, along with liquid supplies for the chef near by.
A bar; your guests will want to watch you cook -- and perhaps eat at the same time.
An Outdoor Fireplace; it will keep your guests warm in the shoulder seasons of spring and autumn, giving you more use of your outdoor kitchen
A grill; either gas or wood-fired. If you are installing a wood-fired oven, consider a wood/charcoal grill.
An Arbor or Pergola; it will design the outdoor kitchen space, and provide shelter from rain, sun, heat and wind.