Cassoulet Toast

Name: Cassoulet Toast
Ingredients: 2 tablespoons olive oil, plus more for drizzling; 1 small onion, thinly sliced; 4 garlic cloves, peeled; 2 (15.5-ounce) cans butter beans, rinsed; ½ cup canned chopped tomatoes; 2 sprigs thyme; Kosher salt and freshly ground black pepper; 1 cup plus tablespoon water; 1 prepared confit duck leg (5 ounces); 4 thick slices airy country bread; Fresh Italian parsley leaves, chopped, for garnish