Should I use "alongside" or "along side"?

Examples of alongside in a sentence

Slice the steaks and serve alongside the white bean mash.

- Mark Bittman's Kitchen Express: 404 Inspired Seasonal Dishes You Can Make in 20 Minutes Or Less by Mark Bittman

Season with salt and pepper and serve alongside the mushrooms and the center circles for dipping.

- Mark Bittman's Kitchen Express: 404 Inspired Seasonal Dishes You Can Make in 20 Minutes Or Less by Mark Bittman

Serve warm, alongside good butter cookies or shortbread.

- Mark Bittman's Kitchen Express: 404 Inspired Seasonal Dishes You Can Make in 20 Minutes Or Less by Mark Bittman

Drizzle the dressing on the fennel and orange slices and serve alongside the fish.

- Mark Bittman's Kitchen Express: 404 Inspired Seasonal Dishes You Can Make in 20 Minutes Or Less by Mark Bittman