Grilled Cheese Sticks

Ingredients (8)

• + 1 tablespoon mayonnaise, divided add to pantry
• + 2 slices day-old sourdough bread add to pantry
• + 2 tablespoons shredded Parmesan cheese add to pantry
• + 2 tablespoons finely grated extra-sharp Cheddar cheese, at room temperature add to pantry
• + 1 tablespoon finely grated Jack cheese, at room temperature add to pantry
• + 2 teaspoons minced green onion add to pantry
• ✓ 1 clove garlic, minced
• ✓ 2 dashes cayenne pepper