Place mayonnaise and chopped jalapeño pepper in a small bowl. Stir to combine.
Spread one teaspoon of butter on one side of each side of bread
Spread mayonnaise & chopped jalapeno mixture over the unbuttered side of each of 2 slices of bread
Arrange the mozzarella cheese, chicken, spinach, tomatoes, and onion. Add salt and pepper to taste. Put the remaining slice of bread on top buttered side up
Arrange chicken Panini on preheated Panini press and close the lid
Grill/bake until chicken is warm, cheese is melted and bread is crispy and browned about 2½ to 3 minutes
Remove from rack and let stand
Serve warm with Lipton Ice Tea to create a perfect pairing
Recipe by Afropolitan Mom at https://www.theafropolitanmom.com/chicken-mozzarella-and-spinach-panini/