1Heat oven to 200. Heat 2 tbsp oil in skillet over med-high heat. add onions and garlic, cook until soft. Add tomato sauce and water, bring to a boil. Reduce heat to med-low, simmer, stirring until thickened a little.
2Stir in chicken and cilantro if using. Stir to coat chicken. Season w/ adobo. Remove from heat.
Heat remaining oil on med-high heat. Cook tortillas until soft, not crisp, about 5 mins. Drain on paper towels.
3Spoon 1-1/2 tbsp chicken mix into center of each tortilla, roll tightly, secure w/ toothpicks. Add plautas, seam side down in skillet. Cook a few at a time. Cook, flipping over occasioanlly until crispy. Place in pan in oven to keep warm. Cook remaining flautas in oil in skillet. Serve topped w/ some sour cream and a sprinkling of cheese.