Rajas con Crema

4 large poblano peppers

 

2 tablespoons butter

 

1 onion, sliced

 

2 large cloves garlic, minced

 

3/4 cup Mexican crema

 

1 teaspoon salt, or to taste

 

1 teaspoon chicken bouillon granules, such as Knorr®

 

1/4 teaspoon freshly ground black pepper

 

1 cup shredded Oaxaca cheese