Try this homemade Onion, Tuna & Spinach Sandwiches recipe the whole family will love. Made with tuna, spinach, onion and Mayonnaise. Easy step-by-step i…
This Onion, Tuna & Spinach Sandwiches relies on simple, everyday ingredients such as canned tuna, grams boiled spinach, marinated onion and mayonnaise. It comes together quickly and makes 4 servings, at about 200 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.
Updated Jun 30, 2026