1. Sprinkle scallops with 3/4 teaspoon seafood seasoning. Melt butter in a large nonstick skillet over medium-high heat; sauté scallops 3 minutes or until opaque. Remove scallops with a slotted spoon. Finely chop when cool enough to handle.
2. Beat cream cheese and sour cream at medium speed with an electric mixer until creamy. Add cheese, remaining 3/4 teaspoon seafood seasoning, and spinach. Beat at low speed just until blended. Stir in scallops.
3. Spoon mixture into a lightly greased 4-cup baking dish. Sprinkle with seafood seasoning, if desired. Bake at 375° for 20 minutes or until bubbly.