Cut bread into 20 1/4-inch slices. Arrange slices on a baking stone.
Chop onion & bell pepper. Grate cheese. In a bowl, combine chicken, onion, bell pepper, 1/2 cup of the cheese, mayonnaise, Seasoning Mix and garlic; mix well.
Divide filling evenly among bread slices. Slice tomatoes. Place one tomato slice over filling on each bread slice. Snip parsley. In a bowl, toss remaining cheese and parsley to combine. Sprinkle over tomato slices.
Bake 15-18 minutes or until golden brown. Serve hot.