Cabbage Calzones

Name: Cabbage Calzones
Ingredients: 4 oz. small red potatoes, cut into 1/2-inch pieces (3/4 cup); 1/4 head green cabbage, cored and sliced into 1/2-inch ribbons (2 cups); 1 Tbs. olive oil, plus more for brushing dough; 1 small onion, finely diced (1 cup); 4 cloves garlic, minced (4 tsp.); 1 1/2 tsp. dried oregano; 1 15-oz. can chopped tomatoes; 8 pitted kalamata olives, coarsely chopped; 2 tsp. red wine vinegar; 3 hard-boiled eggs, each cut into 8 slices; 3 Tbs. chopped fresh parsley; 1 16-oz. pkg. prepared pizza dough