1Heat oven to 400°F. Line cookie sheet with cooking parchment paper. Place beets in even layer on cookie sheet. Drizzle with 2 tablespoons of the oil; sprinkle with table salt. Roast 15 to 20 minutes, turning once, until tender. Set aside.
2Spray 12-inch pizza pan with cooking spray (or use pizza stone). Unroll dough; place on pan. Starting at center, press out dough to edge of pan. Brush with remaining 2 tablespoons oil; sprinkle with sea salt. Layer with mozzarella cheese, spinach, roasted beets and Cheddar cheese.
3Bake 13 to 15 minutes or until crust is golden brown and cheese is melted. Let stand 5 to 10 minutes before slicing.