Prepare seasoning blend by combining all ingredients in a small bowl. Season the cooked lobster evenly with the seasoning blend and set aside.
In a microwave, melt the butter, heating about 30 seconds. Set aside.
Butter 1 side of each piece of bread. Place 2 slices of bread on preparation area, buttered side down. Add 2 slices of Cooper Sharp cheese to each slice of bread. Layer a few spinach leaves on top of the cheese. Portion the seasoned lobster meat equally onto both sandwiches. Add 2 more slices of Cooper Cheese to each sandwich, then cap them off with the remaining 2 slices of bread, buttered side up.
Heat a medium skillet or griddle to 350°F and add some of the melted butter.
When the skillet or griddle is warm, grill the sandwiches for 3-4 minutes or until brown. Flip the sandwiches and continue to grill another 3-4 minutes or until cheese is melted and bread is nicely browned.
Serve warm with a side of Boston baked beans.