Pizza Sauce

I was attracted to the picture, how wonderful is the color of this Pizza sauce. It has an orangy red color, looks thick and viscous,

Ingredients
2 tablespoons olive oil
1 tablespoon butter
1/2 cup onion, chopped
1/4 cup celery, chopped
1 garlic clove, minced
1 (8 ounce) can tomato sauce
1 (6 ounce) can tomato paste
2 tablespoons grated parmesan cheese
1 teaspoon dried basil
1 teaspoon dried oregano
1/2 teaspoon salt
1/2 teaspoon sugar
1/4 teaspoon black pepper
1 small bay leaf
1 teaspoon fennel seed
Directions
1In a large skillet, melt butter with the oil. Add the onion, celery and garlic and saute until soft and transparent.
2Add tomato sauce and tomato paste and stir until smooth.
3Add remaining ingredients and bring to slow simmer.
4Simmer for 30-60 minutes (or not at all depending on your taste and time frame).
5Remove the bay leaf and spread the sauce on your prepared pizza dough.