Seriously Meatless: Polenta Triangles Stuffed With Spicy Greens and Cheese Recipe

Name: Seriously Meatless: Polenta Triangles Stuffed With Spicy Greens and Cheese Recipe
Ingredients: 11 cups water; 2 2/3 cups coarse-ground cornmeal (polenta); 6 tablespoons olive oil, divided; 1 onion, thinly sliced; 3 cloves garlic, thinly sliced; 1 bunch chard, triple washed, stems separated, stems thinly sliced and leaves sliced 1/2 wide; 1 bunch beet greens, triple washed, stems discarded, leaves sliced 1/2 wide; 1 cup red wine; 2 teaspoons chili flakes or more to your taste; 8 oz. caciocavallo + more for garnish (aged provolone is a good substitute, or try smoked mozzarella); Salt