Party Sandwhich Stack

This is another of my aunt's recipe. Tia Chata, as we called her, a term of endearment, was know for her delicious cooking. This is one of her more elegant recipes, made for special occasions.
This is my version, as I remember it.

Mix the following three different group of ingredients to make a smooth paste, separately.

Paste #1
One boiled or baked, chicken breast
1/2 c. chopped celery
12 pimento-stuffed olives
1 Pimento pepper, from a jar
1/2 c. sour cream
Place all ingredients in food processor and process to make a smooth paste.

Paste #2
1/2 lb. cooked ham
3 Pimentos peppers, from a jar
4 T. mayonnaise
2 sweet pickles
Place ingredients in food processor and process to make a smooth paste.

Paste #3
1 can (6.75 oz.) Deviled Ham
2 tsp. prepared mustard
1 T butter, melted
1/4 c. sour cream
1/2 T. chopped onion
Mix all ingredients to make a paste.

1 loaf of sliced white bread, crusts trimmed off.

Assemble sandwich: Place 4 slices of bread on a platter, forming a square.
Spread half of the #1 paste, place another layer of 4 slices of bread and spread half of the #2 paste, then repeat with spread #3. Repeat layers one more time, ending with bread on top. Frost.

Frosting for Party Sandwich:
12 oz. Cream Cheese at room temperature
1/2 c. sour cream
Mix, in electric mixer, until smooth and frost cake. Can decorate top of "cake" with slices
of pimento-stuffed olives and some of the pimentos cut length-wise strips, to form a flower, like a poinsettia for Christmas.