INGREDIENTS
6
bone-in chicken breast halves
7
medium onions, thinly sliced
1 clove
garlic, chopped
1/4 cup
vegetable oil
6
medium tomatoes
1 7 ounce can
chipotle peppers in adobo sauce
1 tbsp
chicken bouillon granules
16
tostada shells
1 cup
sour cream
salt and pepper