In a large bowl, combine the corn kernels with the sour cream, mayo, and half the lime juice. Add the paprika and ¼ Tsp cumin. Mix until everything is well incorporated.
In a sperate bowl combine the remaining lime juice with the olive oil and ¼ Tsp cumin. Add salt and pepper to taste. Drizzle the lettuce with the vinaigrette and toss to combine.
Assemble the salad. Make a bed with the lettuce. Top with the corn, tomatoes and avocado and sprinkle with cotija cheese.
Notes
Use fresh, frozen, or canned corn. If using frozen corn, let it thaw completely before using it.