Italian Tuna Melt Panini

2 cans (each 6 oz/170 g) solid white tuna, drained
1/4 cup (50 mL) light mayonnaise
1 stalk celery, diced
Quarter small red onion, finely diced
3 marinated artichoke hearts, chopped
2 tsp (10 mL) lemon juice
4 panini buns, halved
4 slices provolone cheese (3 oz/90 g)

In bowl, mix together tuna, mayonnaise, celery, onion, artichoke hearts and lemon juice; spread one-quarter over each panini bottom. Top with cheese; cover with panini top.

Cook in panini press on medium-low heat until buns are toasted and cheese is melted, 6 to 8 minutes. (Or cook in skillet, pressing to flatten and turning once.)