Rio Grande Salsa Recipe

I am looking for Uncle Julio’s/Casa Grande/Rio Grande Cafe
Salsa Recipe ? Can anyone assist ?

burn 4 medium tomatoes, half a white onion, and a jalepeno in a cast iron skillet until burnt all over.

place all ingredients in blender with 2 tbls black pepper, 1/2 tbls garlic powder, and salt and cilantro to taste.

blend until desired consistency and enjoy warm or cold!