4 (6-ounce) cans albacore tuna, drained well
1 (14-ounce) can quartered artichoke hearts, drained
1/2 cup chopped red bell or piquillo peppers
3/4 cup sliced Greek olives
1/2 small red onion, finely chopped
1/4 cup chopped flat-leaf parsley
1/4 cup chopped basil
2 cloves garlic, finely chopped
1 teaspoon dried or 1 tablespoon chopped fresh oregano
1/2 cup mayonnaise
3 tablespoons lemon juice
Salt and freshly ground pepper, to taste