Drain 1/c cup of pineapple juice from can of pineapple chunks
Transfer 1 cup of pineapple chunks and 1/2 cup of pineapple juice to a high-power blender. Add chipotle pepper, vinegar, garlic, chili powder, cumin, paprika, and oregano; blend mixture until completely smooth. Set aside.
Heat 2 Tbsp. oil in a large skillet over medium. Once hot, add cauliflower, jalapeno and yellow onion; cook until softened, about 3 minutes.
Add chickpeas; cook 5 to 6 more minutes, stirring only occasionally, allowing the chickpeas to pick up some color and crisp.
Reduce the heat to low stir in the pineapple sauce, Simmer for 4-5 minutes or until the sauce has reduced and coats the chickpeas and cauliflower.
Divide chickpea mixture evenly into 8 warmed tortillas.