Preheat oven to 375 degrees. Slice SPAM into strips. Top with teaspoon diced green chilies and 2 tablespoons shredded cheese. Wrap crescent roll dough around SPAM mixture tucking ends under.
Place rolls on ungreased baking sheet.
Bake 10-12 minutes or until golden brown. During last minute of baking, add remaining cheese to top of rolls and melt. Top each with sour cream and picante sauce. Garnish with fresh cilantro sprigs, if desired.