Easy Potato Gratin with Fennel and California Ripe Olives - California Ripe Olives

Ingredients

• 1 bulb fennel washed, stalks removed, cored
• 1/2 whole yellow onion
• 2 large russet potatoes, washed and peeled
• 1 tablespoon olive oil
• 1 tablespoon salted butter
• 1 cup plus 2 tablespoons heavy whipping cream, divided
• 3/4 cup grated Gruyere cheese, divided
• 3/4 cup grated Jarlsberg cheese, divided
• 1/2 cup California Black Ripe Olives, sliced
• 1/2 teaspoon kosher salt
• 1/8 teaspoon black pepper