In a medium sized mixing bowl, combine the shrimp with the orange juice, chipotle pepper, and garlic. Marinate for 15 minutes.
Heat the olive oil in a large skillet over medium high heat until hot. Add the onion and peppers and cook until lightly charred on the outside. Remove from the skillet and set aside.
Add the shrimp to the skillet and cook for 10 minutes, until the shrimp is no longer opaque. Return the peppers to the skillet, season with salt and pepper, and stir to coat.Heat a large skillet over medium low heat. Spray with cooking spray. Place 1 tortilla on the skillet. Sprinkle with half the cheese, then top with half of the shrimp mixture and the 2nd tortilla.
Cook for 5 minutes, until the bottom is crisp. Then, flip and cook for 3 minutes more. Cut into wedges and serve with salsa and guacamole and garnish with cilantro (if using).