Step 1: In a small bowl, whisk together the sour cream, mayonnaise, lime juice and zest, garlic powder, taco seasoning, salt and pepper until smooth. Set aside.
Step 2: Remove the husks from the corn. If desired, parboil the corn briefly before grilling. Grill over medium-high heat, turning every few minutes until tender and lightly charred. Allow to cool slightly, then carefully cut the kernels off the cob.
Step 3: Cook Kaslo Sourdough Pasta according to the package instructions. Drain and rinse under cold water to cool, then drain well.
Step 4: In a large salad bowl, combine the cooked pasta, arugula, red onion, tomatoes, avocado, feta cheese and grilled corn.
Step 5: Pour the lime crema dressing over the salad and toss gently until everything is evenly coated. Garnish with fresh cilantro, if desired.
Step 6: Serve chilled or enjoy right away!