FOR THE SCALLOPS: Combine ancho, cumin, salt and pepper in a medium shallow bowl. Heat oil in a large sauté pan until smoking.
Dredge 1 side of each scallop in the spice mixture. Place the scallops in the heated pan, chile side down and cook for 20 seconds.
Reduce the heat low, turn the scallops and cook for 2 to 3 minutes more. Remove from pan and reserve.
FOR THE TORTILLA STRIPS: Heat oil to 375 degrees F. Fry the tortilla strips in batches. Remove to a plate lined with paper towels and season with salt.
FOR THE VINAIGRETTE: Combine juices, basil and onion in a blender and blend until smooth. With the motor running, slowly add the olive oil until emulsified. Season with salt and pepper to taste.
FOR THE SALSA: Mix all ingredients into a small bowl.
ASSEMBLY: Place mixed (salad) greens in a large bowl, drizzle with a few tablespoons of the vinaigrette and season with salt and pepper, to taste.
Place the greens on a large platter. Arrange the scallops around the platter. Mound the mango salsa and then the fried tortillas in the center of the plate. Drizzle everything with more of the vinaigrette and serve.