Step 1

In a small blender or food processor, combine dressing ingredients.  Process until smooth, adding a little water, if necessary, for thinner consistency. Set aside.

Step 2

Add butter and oil to a large skillet over medium heat.  When butter is melted, add garlic and sauté 30 seconds.  Add shrimp and season with 1/8 teaspoon salt and pepper. Cook 2 minutes, flip, then add another 1/8 teaspoon salt and pepper. Cook an additional 2 minutes or until shrimp are opaque and cooked through.  Remove from heat and add red pepper (if using), lemon juice, and parsley.  Toss to evenly coat.

Step 3

Meanwhile, heat tortillas according to package directions. In a medium bowl, toss lettuce with 2 tablespoons Caesar dressing.

Step 4

Divide tortillas and shrimp evenly among 4 plates.  Spoon pan sauce over shrimp, top each with freshly grated parmesan, scallions, and Caesar slaw.  Divide remaining 3 tablespoons of dressing evenly over tacos.