Melt butter in a saucepan over medium heat.

Add crushed garlic, chopped onion, sliced celery, and chopped green pepper to the saucepan.

Saute the vegetables in butter for approximately 5 minutes, until softened.

Incorporate salt, pepper, paprika, oregano leaves, tomato sauce, sliced mushrooms, and sliced olives into the saucepan.

Stir well to combine all ingredients.

Reduce heat to low and simmer the sauce for about 10 minutes, allowing the flavors to meld.

Remove from heat and let the sauce cool completely.

For optimal flavor, prepare the sauce one day before serving.

Before serving, thoroughly heat the sauce.

Leftovers can be frozen for future use.