Place the onions, peppers, and cleaned shrimp in a bowl. Drizzle with olive oil and add the cumin, garlic powder, chili powder, smoked paprika, ground coriander (if using), and salt and pepper. Toss to combine.
Heat a skillet over moderate heat. Add the peppers and onions; leave the shrimp out for now since they don't take as long to cook.
Sauté the peppers and onions for about 2 minutes. Add the shrimp and sauté everything for another 3 minutes. Remove from heat and set aside.
Prep your salad bowl by adding the spinach, grape tomatoes, cheese, and crunchy tortilla strips. Top the salad with the warm shrimp and veggies, and drizzle chipotle dressing over it. Toss to combine, give it a spritz of lime juice, and dig in!