Preheat the oven to 350°F (175°C).

Make Johnny’s seasoning: in a small bowl combine 1 ½ Tbsp sea salt, 1 Tbsp paprika, 1 tsp freshly ground pepper, and 1 tsp garlic powder. Set this seasoning aside.

Drain both cans of chicken breast thoroughly and transfer the chicken to a large mixing bowl. Break the chicken up lightly with a fork.

Add 3/4 cup mayonnaise to the chicken. Add Johnny’s seasoning to taste and stir to combine.

Dice the 1 large tomato and chop 1/3 bunch cilantro. Add the diced tomato and chopped cilantro to the chicken mixture and stir.

Add the 6 oz mild cheddar cheese (finely shredded) to the mixture and stir to combine. Alternatively, reserve the shredded cheese and place a slice or the shredded cheese on top of each assembled sandwich before baking (both options are acceptable).

If using Sriracha or another hot sauce, add it to the mixture to taste. If you want a kid-friendly portion, divide the chicken mixture and add hot sauce to only part of it.

Slice the loaf of bread into individual slices and arrange them in a single layer on an ungreased baking sheet.

Spread the chicken mixture generously over each bread slice. If you reserved cheese for the top, place it on now.

Bake uncovered on the baking sheet at 350°F for about 8 minutes, until the cheese is melted and the edges of the bread are lightly golden.

Garnish with additional chopped cilantro and diced tomato if desired. Serve warm.