Pizza Sauce from scratch | I don't want my MTV

Ingredients

• 2 tablespoons olive oil
• 1 tablespoon butter
• ½ cup onion, chopped
• ¼ 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
• ½ teaspoon salt
• ½ teaspoon sugar
• ¼ teaspoon black pepper
• 1 small bay leaf
• 1 teaspoon fennel seed