Heat oven to 400°F. Grease 12-inch pizza pan. Unroll dough; place in greased pan. Starting at center, press out dough to edge of pan. Bake 10 to 12 minutes or until crust begins to brown.
Top with Havarti cheese, spinach, chicken, bell peppers, garlic salt and Cheddar cheese. Bake an additional 10 to 12 minutes or until cheese is melted and crust is golden brown.