Spoonbread Stuffed Poblanos

Name: Spoonbread-Stuffed Poblanos
Ingredients: 4 large poblano peppers (about 1 pound); 1 cup whole milk; 1 tablespoon butter; Kosher salt; Freshly ground pepper; Pinch cayenne pepper; 1/3 cup stone-ground cornmeal (preferably Bob's Red Mill medium grind); 1 cup corn kernels (from 1 large ear); 1 cup grated Pepper Jack cheese; 4 large scallions, thinly sliced (about 1/2 cup); 1/2 teaspoon baking powder; 2 large eggs, seperated; 1/2 cup heavy cream; 1/2 cup (about 3 ounces) cherry tomatoes, preferably Sungolds