INGREDIENTS
•
10 ounces (283 g) canned tuna packed in oil, drained
•
1/2 cup (125 g) store-bought tzatziki
•
1/4 medium red onion, diced (about 50 g)
•
1/2 teaspoon (3 ml) fresh lemon juice
•
8 slices whole-grain bread
•
4 slices Gruyère cheese or other melting cheese
•
4 leaves green-leaf lettuce or romaine, or 1/2 cup packed arugula leaves or any lettuce or leafy greens
•
1 teaspoon (5 ml) extra-virgin olive oil
•
2 tablespoons (2 g) chopped mixed fresh herbs (dill, parsley, mint)
•
Kosher salt
•
Freshly ground black pepper
•
1 avocado, pitted and cut into 1/4-inch (6-mm) thick slices (about 200 g)