Grilling is a huge one. Big Green Eggs can do this fast, so can many other grills. Depending on your oven, you can do them in your own oven using a steel or stone. You can buy simple mini outdoor ovens that heat up to >900 in less than 10 min.

Weber makes a conversion grill for pizza. Pizza Oven Box makes a grill conversion kit for other types of grills.

Pizza ovens are just a ton of money for a very specific food and take about an hour to heat up. Most of the options I've mentioned above are a fraction of that time.