Using a strainer, squeeze out any excess water in the thawed frozen spinach
Melt butter in a sauce pan over medium-high heat. Add salt, pepper, garlic and shallot. Cook until some garlic and shallot pieces are slightly browned.
Add spinach and stir butter mixture into the spinach well.
Add cream cheese, milk and sour cream. Stir until well combined. Remove from heat and set aside.
Preheat grill to medium with a grill tray.
Season fish filets LIBERALLY. This seasoning will give a lot of extra spice to the dip so be generous.
Cook fish for 2 minutes on each side or until white all the way through (If the filets are thin they will cook through very quick).
Shred the fish and combine it in with the spinach in the saucepan. Stir well.
In a casserole dish, spread the dip out. Top with mozzarella and shredded parmesan (if desired) and broil on high until the cheese is melted and reached desired brown-ness.
Serve with your favorite tortilla chips and ENJOY!