Green Chile Chowder

Name: Green Chile Chowder
Ingredients: 1 jalapeno; 2 poblanos; 1 tablespoon butter; 1/2 white or yellow onion, diced; 1 teaspoon minced garlic; 2 cups chicken broth (or vegetable broth for a vegetarian version); 1 large russet potato, peeled and chopped into half-inch pieces; 1/2 teaspoon cumin; 1/2 teaspoon salt, or to taste; 1/4 teaspoon paprika; 1/4 teaspoon pepper; 1/4 teaspoon chili powder; juice of 1 lime; 1/3 cup cilantro, roughly chopped; 2 cups half and half (I used fat free); 1 tablespoon corn starch