Add the mayonnaise, sour cream, parmesan cheese, diced jalapeños, diced onion, red bell pepper, lime juice, garlic powder, cumin, oregano, and salt and pepper to taste to a blender and blend until smooth.
1/2 cup mayonnaise, 1/3 cup sour cream, 2 tbsp parmesan, 2 tbsp diced jalapenos, 2 tbsp diced yellow onion, 1/4 red bell pepper, 1 & 1/2 tbsp lime juice, 1/2 tsp garlic powder, 1/4 tsp cumin, 1/4 tsp dried oregano, Salt and pepper to taste