Preheat oven to 400°.
Heat a large nonstick skillet over medium heat. Coat pan with cooking spray. Add red onion, and cook for 10 minutes or until tender, stirring occasionally. Add 3 tablespoons raisins, garlic, and anchovies; cook for 2 minutes, stirring frequently. Add spinach and greens; cover and cook for 4 minutes or until spinach and greens wilt. Uncover and cook for 3 minutes or until liquid evaporates. Stir in 1/4 teaspoon salt and pepper. Cool slightly.
Place crust on a baking sheet. Sprinkle crust evenly with mozzarella; top evenly with spinach mixture. Sprinkle Asiago evenly over spinach mixture. Bake at 400° for 12 minutes or until cheese melts and begins to brown. Cut pizza into 8 wedges.